Round Gemstones Round Faceted Gemstone Weight - TheGemBank

Round Gemstones Round Faceted Gemstone Weight - TheGemBank

Searching for the carat weight of your favourite gemstone? Use these charts as guide. Round Gemstones Round Faceted Gemstone Weight Chart *approxima...

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Searching for the carat weight of your favourite gemstone? Use these charts as guide.

Round Gemstones

Round Faceted Gemstone Weight Chart *approximate weights

Ruby Sapphire Emerald Diamond Alexandrite Amethyst Aquamarine

2mm

3mm

4mm

5mm

6mm

6.5mm

7mm

8mm

10mm

.05 ct

.15 ct

.34 ct

.65 ct

1.05 ct

1.41 ct

1.60 ct

2.25 ct

4.50 ct

.05 ct

.15 ct

.34 ct

.65 ct

1.05 ct

1.41 ct

1.60 ct

2.25 ct

4.50 ct

.04 ct

.12 ct

.27 ct

.48 ct

.80 ct

1.26 ct

1.70 ct

2.50 ct

6.10 ct

.04 ct

.10 ct

.23 ct

.47 ct

.90 ct

-

1.35 ct

1.90 ct

4.25 ct

.04 ct

.12 ct

.35 ct

.63 ct

1.30 ct

1.86 ct

2.15 ct

2.90 ct

5.20 ct

.04 ct

.10 ct

.20 ct

.40 ct

.70 ct

1.10 ct

1.30 ct

1.80 ct

3.30 ct

.04 ct

.10 ct

.25 ct

.45 ct

.75 ct

1.31 ct

1.60 ct

2.40 ct

3.50 ct

Gemstone Weights and Measures

www.thegembank.com

Citrine Garnet Opal Peridot Topaz Tourmaline Zircon

.04 ct

.10 ct

.20 ct

.40 ct

.70 ct

1.10 ct

1.30 ct

1.80 ct

3.30 ct

.05 ct

.13 ct

.30 ct

.60 ct

1.00 ct

1.40 ct

1.60 ct

2.50 ct

5.75 ct

.02 ct

.09 ct

.16 ct

.34 ct

.57 ct

.75 ct

.83 ct

1.30 ct

2.00 ct

.05 ct

.12 ct

.26 ct

.50 ct

.85 ct

1.11 ct

1.25 ct

2.00 ct

5.25 ct

.04 ct

.11 ct

.30 ct

.56 ct

1.00 ct

1.36 ct

1.55 ct

2.50 ct

5.75 ct

.04 ct

.12 ct

.24 ct

.45 ct

.75 ct

1.28 ct

1.55 ct

2.00 ct

3.00 ct

.06 ct

.17 ct

.36 ct

.69 ct

1.25 ct

1.58 ct

1.75 ct

2.60 ct

5.00 ct

Marquise Gemstones

Marquise Faceted Gemstone Weight Chart *approximate weights

Ruby Sapphire Emerald Diamond Alexandrite Amethyst Aquamarine Citrine Garnet

4x2mm

5x3mm

6x3mm

7x3.5mm

8x4mm

10x5mm

12x6mm

14x7mm

.13 ct

.24 ct

.35 ct

.55 ct

.75 ct

1.15 ct

2.20 ct

3.00 ct

.13 ct

.24 ct

.35 ct

.55 ct

.75 ct

1.15 ct

2.20 ct

3.00 ct

.09 ct

.19 ct

.30 ct

.45 ct

.60 ct

1.40 ct

1.80 ct

2.80 ct

.12 ct

.18 ct

.25 ct

.37 ct

.50 ct

1.00 ct

2.00 ct

3.00 ct

.07 ct

.20 ct

.30 ct

.50 ct

.70 ct

1.25 ct

2.10 ct

3.50 ct

.10 ct

.15 ct

.20 ct

.34 ct

.48 ct

.90 ct

1.59 ct

2.45 ct

.08 ct

.14 ct

.20 ct

.25 ct

.50 ct

.80 ct

1.50 ct

2.75 ct

.10 ct

.15 ct

.20 ct

.35 ct

.50 ct

.90 ct

1.59 ct

2.45 ct

.09 ct

.16 ct

.25 ct

.42 ct

.60 ct

1.20 ct

2.00 ct

2.85 ct

Gemstone Weights and Measures

www.thegembank.com

Opal Peridot Topaz Tourmaline Zircon

.09 ct

.13 ct

.17 ct

.27 ct

.37 ct

.59 ct

1.00 ct

1.25 ct

.10 ct

.17 ct

.25 ct

.37 ct

.50 ct

1.00 ct

2.00 ct

2.55 ct

.07 ct

.17 ct

.30 ct

.50 ct

.70 ct

1.20 ct

2.00 ct

3.40 ct

.10 ct

.20 ct

.30 ct

.45 ct

.60 ct

.85 ct

1.55 ct

2.20 ct

.13 ct

.23 ct

.33 ct

.55 ct

.75 ct

1.25 ct

1.95 ct

3.00 ct

Octagon Cut Gemstones

Octagon Faceted Gemstone Weight Chart *approximate weights

Ruby Sapphire Emerald Diamond Alexandrite Amethyst Aquamarine Citrine Garnet Peridot Topaz

5x3mm

6x4mm

7x5mm

8x6mm

9x7mm

10x8mm

11x9mm

12x10mm

14x10mm

.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

.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

.30 ct

.60 ct

.90 ct

1.80 ct

2.31 ct

3.15 ct

4.50 ct

5.25 ct

5.80 ct

.25 ct

.50 ct

1.00 ct

1.50 ct

3.00 ct

4.00 ct

5.00 ct

7.80 ct

8.80 ct

.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

.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

.25 ct

.50 ct

.80 ct

1.40 ct

2.00 ct

3.00 ct

4.30 ct

4.75 ct

7.75 ct

.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

.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

.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

.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

Gemstone Weights and Measures

www.thegembank.com

Tourmaline Zircon

.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

.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

Oval Cut Gemstones

Oval Faceted Gemstone Weight Chart *approximate weights 5x3mm

6x4mm

7x5mm

8x6mm

9x7mm

10x8mm

11x9mm

12x10mm

14x10mm

.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

.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

.25 ct

.52 ct

.85 ct

1.26 ct 1.90 ct

2.60 ct

3.75 ct

5.00 ct

7.50 ct

.25 ct

.50 ct

.75 ct

1.40 ct 2.00 ct

3.00 ct

4.00 ct

5.00 ct

8.00 ct

.30 ct

.51 ct

.80 ct

1.45 ct 2.00 ct

3.60 ct

4.25 ct

6.00 ct

8.90 ct

.23 ct

.45 ct

.85 ct

1.25 ct 1.75 ct

2.40 ct

3.20 ct

4.50 ct

6.50 ct

.20 ct

.40 ct

.75 ct

1.10 ct 1.75 ct

2.25 ct

3.00 ct

4.50 ct

6.75 ct

.23 ct

.45 ct

.85 ct

1.25 ct 1.75 ct

2.40 ct

3.25 ct

4.20 ct

5.20 ct

Garnet Mozambique

.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

Garnet Rhodolite

.25 ct

.55 ct

1.00 ct

1.40 ct 2.10 ct

2.80 ct

-

-

-

.21 ct

.40 ct

.63 ct

1.02 ct

-

-

-

-

-

.16 ct

.28 ct

.47 ct

.78 ct

1.10 ct

1.65 ct

2.15 ct

3.00 ct

4.00 ct

.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 Sapphire Emerald Diamond Alexandrite Amethyst Aquamarine Citrine

Iolite Opal Peridot

Gemstone Weights and Measures

www.thegembank.com

Tanzanite Topaz Tourmaline Tsavolite Zircon

.20 ct

.48 ct

.89 ct

1.35 ct

.28 ct

.57 ct

1.10 ct

.25 ct

.50 ct

.90 ct

.28 ct

.52 ct

.75 ct

-

-

-

-

1.60 ct 2.50 ct

3.50 ct

4.50 ct

6.00 ct

8.80 ct

1.18 ct 2.30 ct

2.90 ct

3.50 ct

5.25 ct

6.80 ct

-

-

-

-

.40 ct

.75 ct

1.45 ct

4.00 ct

5.60 ct

7.50 ct

8.20 ct

-

-

-

2.00 ct 2.85 ct

Pear Gemstones

Pear Faceted Gemstone Weight Chart *approximate weights

Ruby Sapphire Emerald Diamond Alexandrite Amethyst Aquamarine Citrine Garnet Opal Peridot

5x3mm

6x4mm

7x5mm

8x6mm

9x6mm

10x7mm

12x8mm

14x9mm

.30 ct

.50 ct

.75 ct

1.00 ct

1.85 ct

2.50 ct

4.75 ct

7.90 ct

.30 ct

.50 ct

.75 ct

1.00 ct

1.85 ct

2.50 ct

4.75 ct

7.90 ct

.25 ct

.45 ct

.70 ct

1.05 ct

1.70 ct

2.60 ct

4.15 ct

6.10 ct

.25 ct

.50 ct

.75 ct

1.00 ct

1.50 ct

2.00 ct

3.50 ct

5.00 ct

.30 ct

.50 ct

.85 ct

1.10 ct

2.10 ct

3.60 ct

6.60 ct

8.80 ct

.20 ct

.35 ct

.65 ct

.85 ct

1.25 ct

1.70 ct

4.00 ct

5.00 ct

.20 ct

.35 ct

.65 ct

.90 ct

1.30 ct

1.85 ct

4.20 ct

5.60 ct

.20 ct

.35 ct

.65 ct

.85 ct

1.30 ct

1.70 ct

4.00 ct

5.00 ct

.25 ct

.40 ct

1.00 ct

1.15 ct

1.30 ct

1.80 ct

3.50 ct

5.80 ct

.13 ct

.22 ct

.35 ct

.50 ct

.70 ct

1.03 ct

1.40 ct

2.45 ct

.25 ct

.45 ct

.70 ct

.80 ct

1.10 ct

1.40 ct

3.40 ct

4.75 ct

Gemstone Weights and Measures

www.thegembank.com

Topaz Tourmaline Zircon

.25 ct

.50 ct

1.00 ct

1.10 ct

2.00 ct

3.50 ct

6.50 ct

8.50 ct

.35 ct

.45 ct

.60 ct

.90 ct

1.10 ct

1.40 ct

2.80 ct

6.75 ct

.30 ct

.70 ct

1.00 ct

1.30 ct

2.60 ct

4.00 ct

5.25 ct

7.50 ct

Diamond Conversion Charts Diamonds Round Cut

Decimal Inch

3.3 mm

.14 carat

3.4 mm

.15 carat

3.5 mm

.16 carat

3.6 mm

.17 carat

3.7 mm

.18 carat

3.8 mm 3.9 mm

mm width

decimal width

weight

1.0 mm 1.2 mm

.039 inch

.005 carat .008 carat .01 carat

1.5 mm

.015 carat

1.7 mm

.02 carat

1.8 mm

.025 carat .079 inch

.03 carat

2.1 mm

.035 carat

2.2 mm

.04 carat

2.4 mm

.05 carat

2.5 mm

.06 carat

2.7 mm

.07 carat

2.8 mm

.08 carat

2.9 mm

.09 carat

3.0 mm

.118 inch

3.1 mm 3.2 mm

.125 inch

Gemstone Weights and Measures

.22 carat .158 inch

.23 carat

4.1 mm

.162 inch

1/4 carat

4.2 mm

1.3 mm

.30 carat .173 inch

4.5 mm 4.6 mm

4.8 mm 4.9 mm 5.0 mm 5.2 mm 5.4 mm 5.5 mm 5.6 mm 5.8 mm 6.0 mm

.33 carat .35 carat

.181 inch

.197 inch .205 inch

.228 inch .236 inch

1/3 carat

.40 carat .43 carat .47 carat 1/2 carat .60 carat .63 carat .65 carat 3/4 carat .80 carat

6.2 mm

.85 carat

6.4 mm

.95 carat

1/10 carat

6.5 mm

.11 carat

6.6 mm 6.8 mm

.12 carat

1/5 carat

4.0 mm

4.4 mm

2.0 mm

.150 inch

.255 inch or 1/4 inch

1.00 carat 1.10 carat 1.17 carat www.thegembank.com

7.0 mm 7.2 mm 7.4 mm 7.6 mm 7.8 mm 8.0 mm 8.2 mm 8.4 mm

.276 inch .291 inch .307 inch .315 inch 323 inch

Gemstone Weights and Measures

1-1/4 carat 1.33 carat 1-1/2 carat 1.60 carat 1.75 carat 1.90 carat 2.00 carat 2.15 carat

8.6 mm 8.8 mm 9.0 mm 9.2 mm 9.4 mm 9.6 mm 9.8 mm 10.0 mm

.338 inch .346 inch .354 inch .370 inch

.394 inch

2.25 carat 2.50 carat 2.65 carat 2.85 carat 3.00 carat 3.15 carat 3.35 carat 3-1/2 carat

www.thegembank.com