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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (31): Cushion Cut 12x10 mm Gems Clear All
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ID: 3358272 pcs
thumb image of 15.2ct Cushion Rose-Cut Black Spinel (ID: 335827)
15.19 ct Spinel
12 x 10.1 mm
$ 75.95
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ID: 3657741 pcs
thumb image of 5.3ct Cushion Checkerboard Green Prehnite (ID: 365774)
5.31 ct Prehnite
12 x 9.9 mm
$ 26.71
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ID: 3358302 pcs
thumb image of 14.6ct Cushion Rose-Cut Black Spinel (ID: 335830)
14.56 ct Spinel
12 x 10.1 mm
$ 72.80
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ID: 3358252 pcs
thumb image of 14.5ct Cushion Rose-Cut Black Spinel (ID: 335825)
14.50 ct Spinel
12.1 x 10.2 mm
$ 72.50
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ID: 2251631 pcs
thumb image of 5.4ct Cushion Checkerboard Green Prehnite (ID: 225163)
5.41 ct Prehnite
12 x 10.1 mm
$ 24.34
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ID: 3276251 pcs
thumb image of 5.6ct Cushion Checkerboard Green Prehnite (ID: 327625)
5.58 ct Prehnite
12 x 10 mm
$ 25.11
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ID: 3275771 pcs
thumb image of 5.7ct Cushion Checkerboard Green Prehnite (ID: 327577)
5.67 ct Prehnite
12 x 9.9 mm
$ 25.52
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ID: 2157831 pcs
thumb image of 5.3ct Cushion Checkerboard Green Prehnite (ID: 215783)
5.29 ct Prehnite
12 x 10 mm
$ 23.80
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ID: 3359322 pcs
thumb image of 13.8ct Cushion Rose-Cut Black Spinel (ID: 335932)
13.83 ct Spinel
12 x 10.1 mm
$ 69.15
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ID: 3276271 pcs
thumb image of 5.2ct Cushion Checkerboard Green Prehnite (ID: 327627)
5.23 ct Prehnite
11.9 x 9.9 mm
$ 23.54
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ID: 3358622 pcs
thumb image of 15ct Cushion Rose-Cut Black Spinel (ID: 335862)
15.01 ct Spinel
12 x 10.1 mm
$ 75.05
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ID: 3358292 pcs
thumb image of 14.5ct Cushion Rose-Cut Black Spinel (ID: 335829)
14.50 ct Spinel
12 x 10.1 mm
$ 72.50
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ID: 3358282 pcs
thumb image of 15ct Cushion Rose-Cut Black Spinel (ID: 335828)
15.01 ct Spinel
12 x 10.1 mm
$ 75.05
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ID: 4452151 pcs
thumb image of 4.1ct Cushion-Cut Yellow Golden Citrine (ID: 445215)
4.12 ct Citrine
11.9 x 10 mm
$ 20.60
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ID: 2158111 pcs
thumb image of 5.2ct Cushion Checkerboard Green Prehnite (ID: 215811)
5.18 ct Prehnite
11.8 x 10 mm
$ 24.60
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ID: 3275841 pcs
thumb image of 5.3ct Cushion Checkerboard Green Prehnite (ID: 327584)
5.25 ct Prehnite
11.9 x 10 mm
$ 23.62
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ID: 3358212 pcs
thumb image of 14.6ct Cushion Rose-Cut Black Spinel (ID: 335821)
14.57 ct Spinel
12 x 10.1 mm
$ 72.85
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ID: 3275761 pcs
thumb image of 5.8ct Cushion Checkerboard Green Prehnite (ID: 327576)
5.77 ct Prehnite
12.1 x 10.1 mm
$ 25.96
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ID: 3276301 pcs
thumb image of 5.5ct Cushion Checkerboard Green Prehnite (ID: 327630)
5.51 ct Prehnite
12 x 10 mm
$ 24.80
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ID: 3276241 pcs
thumb image of 5.1ct Cushion Checkerboard Green Prehnite (ID: 327624)
5.11 ct Prehnite
11.8 x 9.8 mm
$ 23.00
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ID: 3359332 pcs
thumb image of 14.4ct Cushion Rose-Cut Black Spinel (ID: 335933)
14.42 ct Spinel
12 x 10.1 mm
$ 72.10
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Cushion Cut 12x10 mm Gems
Some people by gems by color or price, but for many, it is best to buy gems by size - especially if you're in need of a gem to replace a previous item that was lost or damaged. Calibrated cushion shapes, facet cut and cabochon gems available now in 12 mm x 10 mm size range. Shop a wide range of calibrated gemstones by size online at wholesale from GemSelect.

As a general guideline, when it comes to 'calibrated' gems, they are not meant nor expected to be cut to exact measurements. For calibrated gemstones weighing under one carat, most jewelry settings will accommodate a gem which is within 0.2 mm of the calibrated size in order to fit a standard setting. For gemstones that weigh over one carat, a larger variance is acceptable, often around 0.3 mm or slightly higher even. This small variance can usually be accommodated for standard style settings. Round-cut gemstones should also have a greater variance in acceptable size when it comes to calibration; in fact it is usually possible to mount a round stone of any size in the closest standard setting.

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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart