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Standard Gemstones Weight and Sizes Chart

Jun 05, 2024

Standard Gemstones Weight and Sizes Chart

Calibrated Size Charts for Gemstones to be set in Standard Jewelry Mountings

Oval Cut Calibrated Size Chart for Standard Jewelry Mountings (approximate weights)
Size in mm Weight in carat	5×3	6×4	7×5	8×6	9×7	10×8	11×9	12×10	14×12
Alexandrite	.30	.51	.80	1.45	2.00	3.60	4.25	6.00	8.90
Amethyst	.23	.45	.85	1.25	1.75	2.40	3.20	4.50	6.50
Aquamarine	.20	.40	.75	1.10	1.75	2.25	3.00	4.50	6.75
Citrine	.23	.45	.85	1.25	1.75	2.40	3.25	4.20	5.20
Diamond	.25	.50	.75	1.40	2.00	3.00	4.00	5.00	8.00
Emerald	.25	.52	.85	1.26	1.90	2.60	3.75	5.00	7.50
Pyrope Garnet	.25	.55	1.00	1.40	2.10	2.80	3.75	5.00	7.00
Iolite	.21	.40	.63	1.02	–	–	–	–	–
Opal	.16	.28	.47	.78	1.10	1.65	2.15	3.00	4.00
Peridot	.28	.50	.95	1.35	2.00	2.50	3.50	4.00	6.00
Ruby	.35	.60	1.06	1.55	2.20	3.15	3.80	6.00	7.25
Sapphire	.35	.60	1.00	1.55	2.20	3.15	3.80	6.00	7.25
Tanzanite	.20	.48	.89	1.35	–	–	–	–	–
Topaz	.28	.57	1.10	1.60	2.50	3.50	4.50	6.00	8.80
Tourmaline	.25	.50	.90	1.18	2.30	2.90	3.50	5.25	6.80
Tsavorite	.28	.52	.75	–	–	–	–	–	–
Zircon	.40	.75	1.45	2.00	2.85	4.00	5.60	7.50	8.20

Round Cut Calibrated Size Chart for Standard Jewelry Mountings (approximate weights)
Size in mm Weight in carat	2	3	4	5	6	6.5	7	8	10
Alexandrite	.04	.12	.35	.63	1.30	1.86	2.15	2.90	5.20
Amethyst	.04	.10	.20	.40	.70	1.10	1.30	1.80	3.30
Aquamarine	.04	.10	.25	.45	.75	1.31	1.60	2.40	3.50
Citrine	.04	.10	.20	.40	.70	1.10	1.30	1.80	3.30
Diamond	.03	.10	.23	.47	.80	1.00	1.25	1.90	3.50
Emerald	.04	.12	.27	.48	.80	1.26	1.70	2.50	6.10
Pyrope Garnet	.05	.13	.30	.60	1.00	1.40	1.60	2.50	5.75
Opal	.02	.09	.16	.34	.57	.75	.83	1.30	2.00
Peridot	.05	.12	.26	.50	.85	1.11	1.25	2.00	5.25
Ruby	.05	.15	.34	.65	1.05	1.41	1.60	2.25	4.50
Sapphire	.05	.15	.34	.65	1.05	1.41	1.60	2.25	4.50
Topaz	.04	.11	.30	.56	1.00	1.36	1.55	2.50	5.75
Tourmaline	.04	.12	.24	.45	.75	1.28	1.55	2.00	3.00
Zircon	.06	.17	.36	.69	1.25	1.58	1.75	2.60	5.00

Pear Cut Calibrated Size Chart for Standard Jewelry Mountings (approximate weights)
Size in mm Weight in carat	5×3	6×4	7×5	8×6	9×6	10×7	12×8	14×9
Alexandrite	.30	.50	.85	1.10	2.10	3.60	6.60	8.80
Amethyst	.20	.35	.65	.85	1.25	1.70	4.00	5.00
Aquamarine	.20	.35	.65	.90	1.30	1.85	4.20	5.60
Citrine	.20	.35	.65	.85	1.30	1.70	4.00	5.00
Diamond	.25	.50	.75	1.00	1.50	2.00	3.50	5.00
Emerald	.25	.45	.70	1.05	1.70	2.60	4.15	6.10
Pyrope Garnet	.25	.40	1.00	1.15	1.30	1.80	3.50	5.80
Opal	.13	.22	.35	.50	.70	1.03	1.40	2.45
Peridot	.25	.45	.70	.80	1.10	1.40	3.40	4.75
Ruby	.30	.50	.75	1.00	1.85	2.50	4.75	7.90
Sapphire	.30	.50	.75	1.00	1.85	2.50	4.75	7.90
Topaz	.25	.50	1.00	1.10	2.00	3.50	6.50	8.50
Tourmaline	.35	.45	.60	.90	1.10	1.40	2.80	6.75
Zircon	.30	.70	1.00	1.30	2.60	4.00	5.25	7.50

Octagon / Emerald Cut Calibrated Size Chart for Standard Jewelry Mountings (approximate weights)
Size in mm Weight in carat	5×3	6×4	7×5	8×6	9×7	10×8	11×9	12×10	14×12
Alexandrite	.40	.70	1.30	2.60	3.60	4.20	6.00	8.50	9.90
Amethyst	.35	.55	1.10	1.60	2.25	2.90	4.20	5.60	7.25
Aquamarine	.25	.50	.80	1.40	2.00	3.00	4.30	4.75	7.75
Citrine	.35	.55	1.00	1.60	2.25	2.90	4.20	5.60	7.25
Diamond	.25	.50	1.00	1.50	3.00	4.00	5.00	7.80	8.80
Emerald	.30	.60	.90	1.80	2.31	3.15	4.50	5.25	5.80
Pyrope Garnet	.40	.80	1.20	1.70	2.50	3.50	4.30	6.35	9.00
Peridot	.35	.60	1.00	1.70	2.25	3.80	5.25	6.25	8.80
Ruby	.55	.75	1.15	1.60	2.30	2.75	4.00	6.25	9.00
Sapphire	.55	.75	1.15	1.75	2.30	2.75	4.00	6.25	9.00
Topaz	.40	.65	1.25	2.40	3.40	4.00	5.75	8.00	9.50
Tourmaline	.30	.60	1.60	2.15	2.80	3.60	4.30	5.20	8.50
Zircon	.60	.85	1.70	2.35	3.90	450	6.20	7.01	8.95

Marquise Cut Calibrated Size Chart for Standard Jewelry Mountings (approximate weights)
Size in mm Weight in carat	4×2	5×3	6×3	7×3.5	8×4	10×5	12×6	14×7
Alexandrite	.07	.20	.30	.50	.70	1.25	2.10	3.50
Amethyst	.10	.15	.20	.34	.48	.90	1.59	2.45
Aquamarine	.08	.14	.20	.25	.50	.80	1.50	2.75
Citrine	.10	.15	.20	.35	.50	.90	1.59	2.45
Diamond	.12	.18	.25	.37	.50	1.00	2.00	3.00
Emerald	.09	.19	.30	.45	.60	1.40	1.80	2.80
Pyrope Garnet	.09	.16	.25	.42	.60	1.20	2.00	2.85
Opal	.09	.13	.17	.27	.37	.59	1.00	1.25
Peridot	.10	.17	.25	.37	.50	1.00	2.00	2.55
Ruby	.13	.24	.35	.55	.75	1.15	2.20	3.00
Sapphire	.13	.24	.35	.55	.75	1.15	2.20	3.00
Topaz	.07	.17	.30	.50	.70	1.20	2.00	3.40
Tourmaline	.10	.20	.30	.45	.60	.85	1.55	2.20
Zircon	.13	.23	.33	.55	.75	1.25	1.95	3.00

Gemstone (Colored Stones) Standard Size and Weight Chart

Conversion rate : 1 millimeter (mm) = 0.0393700787 inch (in)
1 inch (in) = 25.4 millimeters (mm)

	Oval Cut
	Oval Faceted Gemstone Weight Chart (approximate weights)
	5x3mm	6x4mm	7x5mm	8x6mm	9x7mm	10x8mm	11x9mm	12x10mm	14x10mm
Alexandrite	.30 ct	.51 ct	.80 ct	1.45 ct	2.00 ct	3.60 ct	4.25 ct	6.00 ct	8.90 ct
Amethyst	.23 ct	.45 ct	.85 ct	1.25 ct	1.75 ct	2.40 ct	3.20 ct	4.50 ct	6.50 ct
Aquamarine	.20 ct	.40 ct	.75 ct	1.10 ct	1.75 ct	2.25 ct	3.00 ct	4.50 ct	6.75 ct
Citrine	.23 ct	.45 ct	.85 ct	1.25 ct	1.75 ct	2.40 ct	3.25 ct	4.20 ct	5.20 ct
Emerald	.25 ct	.52 ct	.85 ct	1.26 ct	1.90 ct	2.60 ct	3.75 ct	5.00 ct	7.50 ct
Garnet	.25 ct	.55 ct	1.00 ct	1.40 ct	2.10 ct	2.80 ct	3.75 ct	5.00 ct	7.00 ct
Rhodolite	.25 ct	.55 ct	1.00 ct	1.40 ct	2.10 ct	2.80 ct	-	-	-
Iolite	.21 ct	.40 ct	.63 ct	1.02 ct	-	-	-	-	-
Opal	.16 ct	.28 ct	.47 ct	.78 ct	1.10 ct	1.65 ct	2.15 ct	3.00 ct	4.00 ct
Peridot	.28 ct	.50 ct	.95 ct	1.35 ct	2.00 ct	2.50 ct	3.50 ct	4.00 ct	6.00 ct
Ruby	.35 ct	.60 ct	1.06 ct	1.55 ct	2.20 ct	3.15 ct	3.80 ct	6.00 ct	7.25 ct
Sapphire	.35 ct	.60 ct	1.00 ct	1.55 ct	2.20 ct	3.15 ct	3.80 ct	6.00 ct	7.25 ct
Tanzanite	.20 ct	.48 ct	.89 ct	1.35 ct	-	-	-	-	-
Topaz	.28 ct	.57 ct	1.10 ct	1.60 ct	2.50 ct	3.50 ct	4.50 ct	6.00 ct	8.80 ct
Tourmaline	.25 ct	.50 ct	.90 ct	1.18 ct	2.30 ct	2.90 ct	3.50 ct	5.25 ct	6.80 ct
Tsavorite	.28 ct	.52 ct	.75 ct	-	-	-	-	-	-
Zircon	.40 ct	.75 ct	1.45 ct	2.00 ct	2.85 ct	4.00 ct	5.60 ct	7.50 ct	8.20 ct
	5x3mm	6x4mm	7x5mm	8x6mm	9x7mm	10x8mm	11x9mm	12x10mm	14x10mm

	Pear shape.
	Pear Faceted Gemstone Weight Chart (approximate weights)
	5x3mm	6x4mm	7x5mm	8x6mm	9x6mm	10x7mm	12x8mm	14x9mm
Alexandrite	.30 ct	.50 ct	.85 ct	1.10 ct	2.10 ct	3.60 ct	6.60 ct	8.80 ct
Amethyst	.20 ct	.35 ct	.65 ct	.85 ct	1.25 ct	1.70 ct	4.00 ct	5.00 ct
Aquamarine	.20 ct	.35 ct	.65 ct	.90 ct	1.30 ct	1.85 ct	4.20 ct	5.60 ct
Citrine	.20 ct	.35 ct	.65 ct	.85 ct	1.30 ct	1.70 ct	4.00 ct	5.00 ct
Emerald	.25 ct	.45 ct	.70 ct	1.05 ct	1.70 ct	2.60 ct	4.15 ct	6.10 ct
Garnet	.25 ct	.40 ct	1.00 ct	1.15 ct	1.30 ct	1.80 ct	3.50 ct	5.80 ct
Opal	.13 ct	.22 ct	.35 ct	.50 ct	.70 ct	1.03 ct	1.40 ct	2.45 ct
Peridot	.25 ct	.45 ct	.70 ct	.80 ct	1.10 ct	1.40 ct	3.40 ct	4.75 ct
Ruby	.30 ct	.50 ct	.75 ct	1.00 ct	1.85 ct	2.50 ct	4.75 ct	7.90 ct
Sapphire	.30 ct	.50 ct	.75 ct	1.00 ct	1.85 ct	2.50 ct	4.75 ct	7.90 ct
Topaz	.25 ct	.50 ct	1.00 ct	1.10 ct	2.00 ct	3.50 ct	6.50 ct	8.50 ct
Tourmaline	.35 ct	.45 ct	.60 ct	.90 ct	1.10 ct	1.40 ct	2.80 ct	6.75 ct
Zircon	.30 ct	.70 ct	1.00 ct	1.30 ct	2.60 ct	4.00 ct	5.25 ct	7.50 ct

	Round Cut Gemstones
	Round Faceted Gemstone Weight Chart (approximate weights)
	2mm	3mm	4mm	5mm	6mm	6.5mm	7mm	8mm	10mm
Alexandrite	.04 ct	.12 ct	.35 ct	.63 ct	1.30 ct	1.86 ct	2.15 ct	2.90 ct	5.20 ct
Amethyst	.04 ct	.10 ct	.20 ct	.40 ct	.70 ct	1.10 ct	1.30 ct	1.80 ct	3.30 ct
Aquamarine	.04 ct	.10 ct	.25 ct	.45 ct	.75 ct	1.31 ct	1.60 ct	2.40 ct	3.50 ct
Citrine	.04 ct	.10 ct	.20 ct	.40 ct	.70 ct	1.10 ct	1.30 ct	1.80 ct	3.30 ct
Emerald	.04 ct	.12 ct	.27 ct	.48 ct	.80 ct	1.26 ct	1.70 ct	2.50 ct	6.10 ct
Garnet	.05 ct	.13 ct	.30 ct	.60 ct	1.00 ct	1.40 ct	1.60 ct	2.50 ct	5.75 ct
Opal	.02 ct	.09 ct	.16 ct	.34 ct	.57 ct	.75 ct	.83 ct	1.30 ct	2.00 ct
Peridot	.05 ct	.12 ct	.26 ct	.50 ct	.85 ct	1.11 ct	1.25 ct	2.00 ct	5.25 ct
Ruby	.05 ct	.15 ct	.34 ct	.65 ct	1.05 ct	1.41 ct	1.60 ct	2.25 ct	4.50 ct
Sapphire	.05 ct	.15 ct	.34 ct	.65 ct	1.05 ct	1.41 ct	1.60 ct	2.25 ct	4.50 ct
Topaz	.04 ct	.11 ct	.30 ct	.56 ct	1.00 ct	1.36 ct	1.55 ct	2.50 ct	5.75 ct
Tourmaline	.04 ct	.12 ct	.24 ct	.45 ct	.75 ct	1.28 ct	1.55 ct	2.00 ct	3.00 ct
Zircon	.06 ct	.17 ct	.36 ct	.69 ct	1.25 ct	1.58 ct	1.75 ct	2.60 ct	5.00 ct

	Emerald Cut (octagon cut)
	Octagon Faceted Gemstone Weight Chart (approximate weights)
	5x3mm	6x4mm	7x5mm	8x6mm	9x7mm	10x8mm	11x9mm	12x10mm	14x10mm
Alexandrite	.40 ct	.70 ct	1.30 ct	2.60 ct	3.60 ct	4.20 ct	6.00 ct	8.50 ct	9.90 ct
Amethyst	.35 ct	.55 ct	1.00 ct	1.60 ct	2.25 ct	2.90 ct	4.20 ct	5.60 ct	7.25 ct
Aquamarine	.25 ct	.50 ct	.80 ct	1.40 ct	2.00 ct	3.00 ct	4.30 ct	4.75 ct	7.75 ct
Citrine	.35 ct	.55 ct	1.00 ct	1.60 ct	2.25 ct	2.90 ct	4.20 ct	5.60 ct	7.25 ct
Emerald	.30 ct	.60 ct	.90 ct	1.80 ct	2.31 ct	3.15 ct	4.50 ct	5.25 ct	5.80 ct
Garnet	.40 ct	.80 ct	1.20 ct	1.70 ct	2.50 ct	3.50 ct	4.30 ct	6.35 ct	9.00 ct
Peridot	.35 ct	.60 ct	1.00 ct	1.70 ct	2.25 ct	3.80 ct	5.25 ct	6.25 ct	8.80 ct
Ruby	.55 ct	.75 ct	1.15 ct	1.60 ct	2.30 ct	2.75 ct	4.00 ct	6.25 ct	9.00 ct
Sapphire	.55 ct	.75 ct	1.15 ct	1.75 ct	2.30 ct	2.75 ct	4.00 ct	6.25 ct	9.00 ct
Topaz	.40 ct	.65 ct	1.25 ct	2.40 ct	3.40 ct	4.00 ct	5.75 ct	8.00 ct	9.50 ct
Tourmaline	.30 ct	.60 ct	1.60 ct	2.15 ct	2.80 ct	3.60 ct	4.30 ct	5.20 ct	8.50 ct
Zircon	.60 ct	.85 ct	1.70 ct	2.35 ct	3.90 ct	4.50 ct	6.20 ct	7.01 ct	8.95 ct

	Marquise Cut
	Marquise Faceted Gemstone Weight Chart (approximate weights)
	4x2mm	5x3mm	6x3mm	7x3.5mm	8x4mm	10x5mm	12x6mm	14x7mm
Alexandrite	.07 ct	.20 ct	.30 ct	.50 ct	.70 ct	1.25 ct	2.10 ct	3.50 ct
Amethyst	.10 ct	.15 ct	.20 ct	.34 ct	.48 ct	.90 ct	1.59 ct	2.45 ct
Aquamarine	.08 ct	.14 ct	.20 ct	.25 ct	.50 ct	.80 ct	1.50 ct	2.75 ct
Citrine	.10 ct	.15 ct	.20 ct	.35 ct	.50 ct	.90 ct	1.59 ct	2.45 ct
Emerald	.09 ct	.19 ct	.30 ct	.45 ct	.60 ct	1.40 ct	1.80 ct	2.80 ct
Garnet	.09 ct	.16 ct	.25 ct	.42 ct	.60 ct	1.20 ct	2.00 ct	2.85 ct
Opal	.09 ct	.13 ct	.17 ct	.27 ct	.37 ct	.59 ct	1.00 ct	1.25 ct
Peridot	.10 ct	.17 ct	.25 ct	.37 ct	.50 ct	1.00 ct	2.00 ct	2.55 ct
Ruby	.13 ct	.24 ct	.35 ct	.55 ct	.75 ct	1.15 ct	2.20 ct	3.00 ct
Sapphire	.13 ct	.24 ct	.35 ct	.55 ct	.75 ct	1.15 ct	2.20 ct	3.00 ct
Topaz	.07 ct	.17 ct	.30 ct	.50 ct	.70 ct	1.20 ct	2.00 ct	3.40 ct
Tourmaline	.10 ct	.20 ct	.30 ct	.45 ct	.60 ct	.85 ct	1.55 ct	2.20 ct
Zircon	.13 ct	.23 ct	.33 ct	.55 ct	.75 ct	1.25 ct	1.95 ct	3.00 ct

Standard Gem Sizes Chart Image

Printable Actual Size Gem Size Chart

Rounds		Squares		Ovals
Size	Weight	Size	Weight	Size	Weight
1.6 mm	.02 carat	5 mm	.75 carat	5 x 3 mm	.25 carat
2 mm	.03 carat	6 mm	1.3 carat	6 x 4 mm	.5 carat
2.5 mm	.06 carat	7 mm	2.05 carat	7 x 5 mm	1.0 carat
3 mm	.10 carat	8 mm	2.9 carat	8 x 6 mm	1.5 carat
3.5 mm	.16 carat	9 mm	4.4 carat	9 x 7 mm	2.5 carat
4 mm	.25 carat	10 mm	6.0 carat	10 x 8 mm	3.0 carat
4.5 mm	.33 carat	11 mm	8.0 carat	11 x 9 mm	4.0 carat
5 mm	.50 carat	12 mm	10.35 carat	12 x 10 mm	5.0 carat
5.5 mm	.65 carat	13 mm	13.2 carat	14 x 10 mm	6.0 carat
6 mm	.75 carat	14 mm	16.5 carat	14 x 12 mm	8.0 carat
6.5 mm	1.0 carat	15 mm	20.25 carat	16 x 12 mm	10.5 carat
7 mm	1.25 carat	16 mm	24.6 carat	18 x 13 mm	14.2 carat
8 mm	2.0 carat	20 x 15 mm	20.3 carat
9 mm	2.75 carat	22 x 15 mm	23.5 carat
10 mm	3.5 carat	23 x 17 mm	32.2 carat
11 mm	4.6 carat	25 x 18 mm	43.0 carat
12 mm	6.0 carat	27 x 20 mm	58.5 carat
13 mm	7.75 carat	30 x 22 mm	79.6 carat
14 mm	9.65 carat
15 mm	11.85 carat
16 mm	14.35 carat
17 mm	17.25 carat
18 mm	20.5 carat
19 mm	24.0 carat
20 mm	28.0 carat
21 mm	34.8 carat
22 mm	41.8 carat
23 mm	49.8 carat
24 mm	57.9 carat
25 mm	68.7 carat

Emerald		Pear		Marquis
6 x 4 mm	.5 carat	6 x 5 mm	.7 carat	4 x 2 mm	.10 carat
7 x 5 mm	1.0 carat	7 x 5 mm	.75 carat	5 x 2.5 mm	.25 carat
8 x 6 mm	1.5 carat	8 x 5 mm	1.0 carat	6 x 3 mm	.30 carat
9 x 7 mm	2.5 carat	9 x 6 mm	1.5 carat	8 x 4 mm	.75 carat
10 x 8 mm	3.0 carat	10 x 7 mm	2.0 carat	10 x 5 mm	1.0 carat
11 x 9 mm	4.0 carat	11 x 7 mm	2.25 carat	12 x 6 mm	2.0 carat
12 x 10 mm	5.0 carat	12 x 8 mm	3.0 carat	14 x 7 mm	3.0 carat
14 x 10 mm	6.0 carat	13 x 9 mm	3.5 carat	16 x 8 mm	4.0 carat
14 x 12 mm	8.0 carat	15 x 10 mm	5.5 carat	18 x 9 mm	6.0 carat
16 x 12 mm	10.5 carat	16 x 12 mm	8.6 carat	20 x 10 mm	8.5 carat
18 x 13 mm	14.2 carat	18 x 13 mm	12 carat
20 x 15 mm	20.3 carat	20 x 15 mm	17.3 carat
25 x 18 mm	52.2 carat	22 x 15 mm	18.7 carat
25 x 18 mm	30.6 carat
30 x 22 mm	54.5 carat

Calibrated Standard Stone Size Charts for Gemstones to be set in Standard Jewelry Mountings Chart

Estimating Weights for Standard Faceted Cut Diamond

Rounds		Squares / Princess		Ovals
Size	Weight	Size	Weight	Size	Weight
1.6 mm	.02 carat	2 mm	.05 carat	5 x 3 mm	.25 carat
2 mm	.03 carat	2.5 mm	.09 carat	6 x 4 mm	.5 carat
2.5 mm	.06 carat	3 mm	.16 carat	7 x 5 mm	.75 carat
3 mm	.10 carat	3.5 mm	.25 carat	8 x 6 mm	1.0 carat
3.5 mm	.16 carat	4 mm	.33 carat	9 x 7 mm	1.5 carat
4 mm	.25 carat	4.5 mm	.50 carat	10 x 8 mm	2.16 carat
4.5 mm	.33 carat	5 mm	.75 carat	11 x 9 mm	3.5 carat
5 mm	.50 carat	5.5 mm	1.0 carat	12 x 10 mm	4.25 carat
5.5 mm	.62 carat	6 mm	1.25 carat	14 x 10 mm	6.0 carat
6 mm	.75 carat	6.5 mm	1.5 carat	14 x 12 mm	8.0 carat
6.5 mm	1.0 carat	7 mm	2.0 carat	16 x 12 mm	9.33 carat
7 mm	1.25 carat	7.5 mm	2.5 carat	18 x 13 mm	14.2 carat
7.5 mm	1.62 carat	8 mm	3.0 carat
8 mm	2.0 carat	8.5 mm	3.75 carat
8.5 mm	2.33 carat	9 mm	4.0 carat
9 mm	2.9 carat	9.5 mm	5.0 carat
9.5mm	3.25 carat	10 mm	5.5 carat
10 mm	3.75 carat	10.5 mm	6.0 carat
10.5 mm	4.5 carat	11 mm	7.5 carat
11 mm	5.0 carat	12 mm	9.5 carat
11.5 mm	5.375 carat	13 mm	13.2 carat
12 mm	6.125 carat	14 mm	16.5 carat
13 mm	7.75 carat	15 mm	20.25 carat
14 mm	9.75 carat	16 mm	24.6 carat
15 mm	11.85 carat
16 mm	16 carat
17 mm	17.25 carat
8 mm	20.5 carat
19 mm	24.0 carat
20 mm	28.0 carat
21 mm	34.8 carat
22 mm	41.8 carat

Emerald		Pear		Marquise
Size	Weight	Size	Weight	Size	Weight
5 x 3 mm	.33 carat	3 x 2 mm	.05 carat	4 x 2 mm	.08 carat
6 x 4 mm	.625 carat	4 x 3 mm	.14 carat	5 x 2.5 mm	.15 carat
7 x 5 mm	1.25 carat	5 x 3 mm	.2 carat	5 x 3 mm	.20 carat
8 x 6 mm	1.75 carat	6 x 4 mm	.33 carat	6 x 3 mm	.25 carat
9 x 7 mm	2.5 carat	7 x 5 mm	.5 carat	8 x 4 mm	.50 carat
10 x 8 mm	3.75 carat	8 x 5 mm	.9 carat	9 x 5 mm	.75 carat
11 x 9 mm	4.75 carat	9 x 6 mm	1.5 carat	10 x 5 mm	.9 carat
12 x 10 mm	5.0 carat	10 x 7 mm	1.75 carat	11 X 5.5 mm	1.12 carat
14 x 10 mm	8.5 carat	11 x 7 mm	2 carat	12 x 6 mm	2.0 carat
14 x 12 mm	9.0 carat	12 x 8 mm	3.0 carat	14 x 7 mm	3.0 carat
16 x 12 mm	10.5 carat	13 x 9 mm	3.5 carat	16 x 8 mm	4.0 carat
18 x 13 mm	14.2 carat	15 x 10 mm	5 carat	18 x 9 mm	6.0 carat
20 x 15 mm	20.3 carat	16 x 12 mm	8.6 carat	20 x 10 mm	8.5 carat
25 x 18 mm	52.2 carat	18 x 12 mm	9.3 carat
25 x 18 mm	30.6 carat	20 x 15 mm	18 carat
30 x 22 mm	54.5 carat	22 x 16 mm	23 carat
		23 x 17 mm	25 carat
		25 x 18mm	27 carat
		27 x 20mm	30 carat
		30 x 22mm	34 carat

Cushion		Heart		Asscher
Size	Weight	Size	Weight	Size	Weight
4 x 4 mm	.375 carat	4 x 4 mm	.25 carat	3 x 3 mm	.16 carat
4.5 x 4.5 mm	.5 carat	5 x 5 mm	.5 carat	3.5 x 3.5 mm	.25 carat
5 x 5 mm	.625 carat	6 x 6 mm	.75 carat	4 x 4 mm	.33 carat
5.5 x 5.5 mm	.75 carat	6.5 x& 6..5 mm	1.0 carat	4.5 x 4.5 mm	.5 carat
6 x 6 mm	1.25 carat	7 x 7 mm	1.5 carat	5 x 5 mm	.75 carat
6.5 x 6..5 mm	1.5 carat	8 x 8 mm	2.0 carat	5.5 x 5.5 mm	1.0 carat
7 x 7 mm	2.0 carat	9 x 9 mm	3.0 carat	5.9 x 5.9 mm	1.33 carat
8 x 6 mm	2.0 carat	10 x 10 mm	4.0 carat	6 x 6 mm	1.25 carat
8 x 8 mm	2.9 carat	11 x 11 mm	5.0 carat	6.25 x 6.25 mm	1.37 carat
9 x 7 mm	2.5 carat	12 x 12 mm	5.66 carat	6.5 x 6.5mm	1.5 carat
10 x 8 mm	4.0 carat	15 x 15 mm	10.75 carat	6.6 x 6.6 mm	1.75 carat
12 x 10 mm	7.5 carat	16 x 16 mm	13.25 carat	7 x 7 mm	2.0 carat
14 x 10 mm	9.5 carat	18 x 18 mm	15.33 carat	8 x 8 mm	3.0 carat

Trillion
Size	Weight	Size	Weight
2 x 2 x 2 mm	0.04 carat
3 x 3 x 3mm	0.06 carat
3.5 x 3.5 x 3.5mm	0.125 carat
4 x 4 x 4mm	0.1666 carat
4.5 x 4.5 x 4.5mm	0.2 carat
5 x 5 x 5mm	0.333 carat
5.5 x 5.5 x 5.5mm	0.375 carat
6 x 6 x 6mm	0.5 carat

Faceted Gemstone Weight and Size Charts

Round (rd)

Size / mm

1.5

2.5

3.5

4.5

5.5

6.5

7.5

Amethyst - CT

0.01

0.02

0.04

0.07

0.1

0.14

0.2

0.28

0.4

0.52

0.7

0.91

1.3

1.5

1.8

3.3

Aquamarine - CT

0.01

0.02

0.04

0.06

0.1

0.16

0.25

0.33

0.45

0.57

0.75

1.09

1.6

1.92

2.2

3.5

Citrine - CT

0.01

0.02

0.04

0.07

0.1

0.14

0.2

0.28

0.4

0.52

0.7

0.91

1.3

1.5

1.8

3.3

Cubic Zirconia - CT

0.01

0.03

0.05

0.09

0.18

0.28

0.45

0.63

0.9

1.08

1.44

1.8

2.25

2.7

3.6

7.2

Diamond - CT

0.01

0.02

0.03

0.05

0.1

0.16

0.25

0.35

0.5

0.6

0.8

1.25

1.5

Emerald - CT

0.01

0.02

0.04

0.08

0.12

0.2

0.27

0.38

0.48

0.65

0.8

1.16

1.55

1.85

2.2

4.25

Garnet - CT

0.01

0.03

0.05

0.08

0.13

0.2

0.3

0.42

0.6

0.76

1.24

1.6

1.96

2.5

5.75

Opal - CT

0.01

0.02

0.05

0.09

0.12

0.16

0.23

0.34

0.43

0.57

0.67

0.83

1.02

1.3

Peridot - CT

0.01

0.02

0.05

0.77

0.12

0.18

0.26

0.36

0.5

0.62

0.85

1.01

1.25

1.55

5.25

Ruby - CT

0.01

0.03

0.05

0.09

0.15

0.24

0.34

0.45

0.6

0.82

1.05

1.3

1.7

2.3

4.75

Sapphire - CT

0.01

0.03

0.05

0.09

0.15

0.24

0.34

0.45

0.6

0.82

1.05

1.3

1.7

2.3

4.75

Topaz - CT

0.01

0.02

0.04

0.07

0.11

0.19

0.3

0.41

0.56

0.73

1.22

1.55

1.93

2.5

5.75

Tourmaline - CT

0.01

0.02

0.04

0.08

0.12

0.17

0.24

0.32

0.45

0.57

0.75

1.01

1.25

1.55

3.2

Oval (ov)

Size / mm

5x3

6x4

7x5

8x6

9x7

10x8

11x9

12x10

Amethyst - CT

0.23

0.45

0.85

1.25

1.75

2.4

3.2

4.5

Aquamarine - CT

0.2

0.4

0.75

1.1

1.75

2.25

4.5

Citrine - CT

0.23

0.45

0.85

1.25

1.75

2.4

3.2

4.5

Cubic Zirconia - CT

0.45

0.9

1.26

2.35

3.6

5.4

7.2

Diamond - CT

0.25

0.5

0.75

1.4

Emerald - CT

0.28

0.52

0.85

1.6

2.25

3.75

Garnet - CT

0.25

0.55

1.4

2.1

2.8

3.75

Opal - CT

0.16

0.28

0.47

0.78

1.1

1.65

2.15

Peridot - CT

0.28

0.5

0.95

1.35

2.25

3.5

Ruby - CT

0.35

0.6

1.55

2.2

3.15

3.8

Sapphire - CT

0.35

0.6

1.55

2.2

3.15

3.8

Topaz - CT

0.27

0.57

1.1

1.6

2.5

3.5

4.5

Tourmaline - CT

0.25

0.5

0.9

1.18

2.3

2.9

3.5

5.25

Emerald Cut (ec)

Size / mm

5x3

6x4

7x5

8x6

9x7

10x8

11x9

12x10

Amethyst - CT

0.35

0.55

1.6

2.25

2.9

4.2

5.6

Aquamarine - CT

0.25

0.5

0.8

1.4

4.3

4.75

Citrine - CT

0.35

0.55

1.6

2.25

2.9

4.2

5.6

Cubic Zirconia - CT

0.45

0.9

1.8

2.7

4.5

5.85

12.6

Diamond - CT

0.25

0.5

1.5

2.5

3.25

Emerald - CT

0.3

0.6

0.9

1.8

2.31

3.15

4.5

5.25

Garnet - CT

0.4

0.8

1.2

1.7

2.5

3.5

4.3

6.35

Peridot - CT

0.35

0.6

1.7

2.25

3.8

5.25

6.25

Ruby - CT

0.55

0.7

1.15

1.7

2.3

3.4

6.25

Sapphire - CT

0.55

0.7

1.15

1.7

2.3

3.4

6.25

Topaz - CT

0.4

0.65

1.25

2.4

3.4

5.75

Tourmaline - CT

0.3

0.6

1.6

2.15

2.8

3.6

4.3

5.2

Pear Shape (ps)

Size / mm

5x3

6x4

7x5

8x5

9x6

10x7

Amethyst - CT

0.2

0.35

0.65

0.85

1.2

1.7

Aquamarine - CT

0.2

0.35

0.65

0.9

1.3

1.85

Citrine - CT

0.2

0.35

0.65

0.85

1.2

1.7

Cubic Zirconia - CT

0.45

0.9

1.26

1.53

1.89

3.6

Diamond - CT

0.25

0.5

0.7

0.85

1.05

Emerald - CT

0.25

0.45

0.7

1.05

1.7

2.6

Garnet - CT

0.25

0.4

1.15

1.3

1.8

Opal - CT

0.13

0.22

0.35

0.5

0.7

1.03

Peridot - CT

0.25

0.45

0.7

0.8

1.1

1.4

Ruby - CT

0.3

0.5

0.85

1.05

1.85

2.5

Sapphire - CT

0.3

0.5

0.85

1.05

1.85

2.5

Topaz - CT

0.25

0.5

1.1

1.4

Tourmaline - CT

0.35

0.45

0.6

0.9

1.1

1.4

Marquise (mq)

Size / mm

4x2

6x3

8x4

10x5

12x6

Amethyst - CT

0.1

0.2

0.48

0.9

1.59

Aquamarine - CT

0.08

0.2

0.5

0.8

1.5

Citrine - CT

0.1

0.2

0.48

0.9

1.59

Cubic Zirconia - CT

0.18

0.45

0.9

1.8

2.7

Diamond - CT

0.1

0.25

0.5

1.5

Emerald - CT

0.09

0.3

0.6

1.1

1.8

Garnet - CT

0.09

0.25

0.6

1.2

Opal - CT

0.09

0.17

0.37

0.59

Peridot - CT

0.1

0.25

0.5

Ruby - CT

0.13

0.35

0.75

1.15

2.2

Sapphire - CT

0.13

0.35

0.75

1.15

2.2

Topaz - CT

0.07

0.3

0.7

1.2

Tourmaline - CT

0.1

0.3

0.6

0.85

1.55

Square (sq)

Size / mm

1.5

2.5

3.5

4.5

Amethyst - CT

...

0.1

0.15

0.23

0.3

0.4

Aquamarine - CT

...

0.11

0.18

0.25

0.34

0.45

Citrine - CT

...

0.1

0.15

0.23

0.3

0.4

Cubic Zirconia - CT

0.02

0.05

0.09

0.15

0.22

0.32

0.39

0.5

Diamond - CT

0.02

0.05

0.09

0.15

0.22

0.32

0.39

0.5

Emerald - CT

0.03

0.07

0.11

0.18

0.25

0.35

0.41

0.5

Garnet - CT

...

0.15

0.27

0.4

0.54

0.75

Peridot - CT

...

0.14

0.22

0.34

0.46

0.65

Ruby - CT

0.04

0.07

0.13

0.2

0.3

0.4

0.47

0.55

Sapphire - CT

0.04

0.07

0.13

0.2

0.3

0.4

0.47

0.55

Topaz - CT

...

0.12

0.24

0.35

0.51

0.7

Tourmaline - CT

...

0.13

0.2

0.33

0.41

0.55

Why Colorful Gemstones Are So Popular Right Now (and How to Use Them in Your Designs)

People love them for their colors and charm. This trend is growing fast. You see colorful gemstones everywhere. It will also show how to use them in your designs. You will learn about their appeal.

What Are Colored Gemstones?

Colored gemstones are stones with various colors. They can be natural or synthetic. Each stone has a unique color. They offer a wide range of choices. You can find the perfect gem for any design.

Natural vs. Synthetic Gemstones

Natural gemstones are mined from the earth. They are formed through geological processes.. Both types are popular in jewelry. Natural gemstones are often more valuable. Synthetic gemstones are usually more affordable. They offer a cost-effective alternative. You get beauty and quality without the high price. Knowing the difference helps you make informed choices for your designs.

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Why Colorful Gemstones Are So Popular Right Now

Colorful gemstones are incredibly popular. Plus, they are unique. This uniqueness appeals to people. They want something special and one-of-a-kind. Third, colored gemstones have meanings. People are drawn to the stories and symbolism behind them. For example, sapphires symbolize wisdom. Rubies represent love and passion.

This creates a trend. People want to emulate their favorite stars. They are inspired by the beautiful pieces they see online. This drives demand for colorful gemstones.

Some opt for lab-grown stones. These have a lower environmental impact. This makes colorful gemstones an attractive choice.

In summary, colorful gemstones are popular for their variety, uniqueness, meaning, versatility, and ethical appeal. They offer something for everyone. Their charm and appeal continue to grow. They are a favorite choice for many.

Why Choose Colored Gemstones for Your Custom Design?

They make it stand out. Colored gemstones can match your personality. They can represent something meaningful. They offer a wide range of colors. This allows for creativity in your design.

Personalization

Colored gemstones allow for personalization. You can choose stones with special meaning. Birthstones, favorite colors, or stones with specific properties can be used.

Versatility

Colored gemstones offer versatility. You can experiment with different combinations to create something unique.

Symbolism

Garnet symbolizes strength and protection. Using these stones in your designs adds depth and significance.

What to Consider When Purchasing Colored Gemstones

They determine the beauty of the gemstone. Second, consider the clarity. Some gemstones have inclusions. These can affect the stone's appearance. Third, think about the cut. A good cut enhances the gemstone's brilliance. Fourth, check the carat weight. This affects the size and price of the gemstone. Finally, ensure the gemstone is certified. This guarantees its authenticity.

1. Color

The color should be even throughout the stone. Avoid gems with too many dark or light areas.

2. Clarity

Clarity refers to the presence of inclusions or flaws within the stone.

3. Cut

The cut of the gemstone affects its brilliance and sparkle. It will have even proportions and a smooth finish.

4. Carat Weight

Carat weight measures the size of the gemstone. Larger stones are rarer and more expensive. Balance size with other quality factors when making your choice.

5. Certification

Always choose certified gemstones. This gives you confidence in your purchase.

Popular Gemstone Colors

Blue

They symbolize wisdom and royalty. Aquamarine is another popular blue gemstone. It is light blue and represents tranquility.

Red

Red gemstones are bold and passionate. Rubies are the most famous red gems. They symbolize love and strength. Garnets are also popular.

Green

Green gemstones are a bright green and represent happiness.

Pink

Pink gemstones are romantic and delicate. Pink sapphires are also sought after. They add a touch of elegance to any piece.

Yellow

Yellow gemstones symbolize happiness and success. Yellow sapphires are also popular. They add warmth to jewelry designs.

These colors are just a few examples. There are many other beautiful gemstone colors. Each color has its charm and meaning.

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Tips for Caring for Your Colored Gemstones Jewelry

Proper care ensures it stays beautiful. Here are some tips:

Clean Regularly

Clean your gemstone jewelry regularly. They can damage the stone. Gently scrub the jewelry. Rinse with water. Pat dry with a soft cloth.

Store Properly

Store your jewelry properly. Keep it in a jewelry box. Use separate compartments. This prevents scratches. This preserves the color.

Handle with Care

Handle your jewelry with care. Avoid wearing it during physical activities. This prevents damage. Remove it before swimming or showering. Chlorine and saltwater can harm the gemstone.

Regular Inspections

Inspect your jewelry regularly. Check for loose stones. Ensure the settings are secure.

How to Use Colorful Gemstones in Your Designs?

Using colorful gemstones in your designs is exciting. They add vibrancy and personality. Here are some ideas:

1. Feature Stone

Use a colorful gemstone as the feature stone. This makes it the focal point. Choose a large, vibrant gemstone. Surround it with smaller stones. This creates a stunning effect. It draws attention to the main gemstone.

2. Accents

Use colorful gemstones as accents. They can complement the main stone. For example, use small rubies around a diamond. This adds a pop of color. It enhances the overall design. Accents can be subtle or bold. Choose what works best for your design.

3. Mixed Colors

Mix different colored gemstones. This creates a playful and vibrant design. Use complementary colors. For example, combine blue sapphires with yellow citrines. This adds contrast and interest. Mixed colors make your jewelry unique.

4. Birthstones

Incorporate birthstones into your design. Each month has a specific gemstone. Use these in personalized jewelry. This adds a meaningful touch. It makes the piece special. Birthstones are popular in custom designs.

5. Theme-Based Designs

Create theme-based designs. Use gemstones that match the theme. For example, use green gemstones for a nature-inspired piece. Use red and pink stones for a romantic design. Themes help guide your gemstone choices.

6. Symbolic Designs

Use gemstones with symbolic meanings. Choose stones that represent qualities you admire. For example, use amethyst for peace and clarity. Use garnet for strength and protection. Symbolic designs add depth to your jewelry.

7. Layering

Layer different gemstone jewelry pieces. This creates a trendy look. Use necklaces with different gemstone colors. Stack rings with various stones. Layering adds dimension and style. It allows you to showcase multiple gemstones.

8. Customization

Offer customization options. Let clients choose their favorite gemstones. This creates personalized designs. Customization attracts customers. It makes your jewelry unique. Clients appreciate the personal touch.

9. Combining Metals

Combine different metals with gemstones. Use gold, silver, and rose gold. This adds contrast and elegance. Mixed metals highlight the gemstone colors. They make your design more interesting.

Conclusion

Colorful gemstones are incredibly popular right now. They offer variety, uniqueness, and meaning. They are versatile and ethically appealing. Use them as feature stones, accents, or mixed colors. Create theme-based and symbolic designs. Offer customization and combine different metals. Embrace this trend. Make your designs stand out. Colorful gemstones are here to stay. Enjoy their beauty and appeal. Create stunning pieces that capture hearts and eyes. They are a wonderful opportunity to explore new creative possibilities in jewelry design.

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Contact Us For Custom Jewelry

Please get in touch with us and share your ideas if you have personalized jewelry or are searching for a private label jewelry manufacturer. In accordance with your suggestions, we will make and present genuine jewelry.

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Standard Gemstones Weight and Sizes Chart

Oval Cut

Pear Cut

Octagon / Emerald Cut

Marquise Cut

Gemstone (Colored Stones) Standard Size and Weight Chart

Conversion rate : 1 millimeter (mm) = 0.0393700787 inch (in) 1 inch (in) = 25.4 millimeters (mm)

Oval Cut

Pear shape.

Round Cut Gemstones

Emerald Cut (octagon cut)

Marquise Cut

Standard Gem Sizes Chart Image

Printable Actual Size Gem Size Chart

Calibrated Standard Stone Size Charts for Gemstones to be set in Standard Jewelry Mountings Chart

Faceted Gemstone Weight and Size Charts

Why Colorful Gemstones Are So Popular Right Now (and How to Use Them in Your Designs)

What Are Colored Gemstones?

Natural vs. Synthetic Gemstones

Why Colorful Gemstones Are So Popular Right Now

Why Choose Colored Gemstones for Your Custom Design?

Personalization

Versatility

Symbolism

What to Consider When Purchasing Colored Gemstones

1. Color

2. Clarity

3. Cut

4. Carat Weight

5. Certification

Popular Gemstone Colors

Blue

Red

Green

Pink

Yellow

Tips for Caring for Your Colored Gemstones Jewelry

Clean Regularly

Store Properly

Handle with Care

Regular Inspections

How to Use Colorful Gemstones in Your Designs?

1. Feature Stone

2. Accents

3. Mixed Colors

4. Birthstones

5. Theme-Based Designs

6. Symbolic Designs

7. Layering

8. Customization

9. Combining Metals

Conclusion

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Conversion rate : 1 millimeter (mm) = 0.0393700787 inch (in)
1 inch (in) = 25.4 millimeters (mm)