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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (38): Cushion Shape 10x8 mm Gems Clear All
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3.9ct Cushion Rose-Cut Black Spinel Gem (ID: 329178)
3.93 ct (total 7.86ctw) Spinel
10 x 8.1 mm
$ 15.72
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4.2ct Cushion Rose-Cut Black Spinel Gem (ID: 328995)
4.22 ct (total 8.44ctw) Spinel
10.1 x 8.1 mm
$ 16.88
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1 pc
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4.1ct Cushion-Cut Orange Sphalerite Gem (ID: 466461)
4.09 ct Sphalerite
10.4 x 8.1 mm
$ 163.60
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2.5ct Cushion Checkerboard Lively Green Peridot Gem (ID: 334164)
2.54 ct Peridot
9.7 x 7.7 mm
$ 91.44
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2.7ct Cushion-Cut Honey Orange Andesine Labradorite Gem (ID: 376008)
2.65 ct Andesine Labradorite
10.1 x 8 mm
$ 53.00
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3ct Cushion Checkerboard Lively Green Peridot Gem (ID: 334422)
2.97 ct Peridot
9.9 x 8.1 mm
$ 106.92
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3.4ct Cushion-Cut Pinkish Rose Malaya Garnet Gem (ID: 495946)
3.38 ct Malaya Garnet
10.1 x 8 mm
$ 143.65
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4.3ct Cushion-Cut Violet Blue Tanzanite Gem (ID: 412522)
4.32 ct Tanzanite
10.4 x 7.7 mm
$ 1,252.80
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5ct Cushion Shape Sugarloaf Cabochon Multicolor Green Malachite Gem (ID: 499867)
5.01 ct Malachite
9.9 x 8.2 mm
$ 5.26
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2.3ct Cushion Checkerboard Light Blue Aquamarine Gem (ID: 479268)
2.32 ct Aquamarine
9.7 x 7.7 mm
$ 162.40
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2.7ct Cushion-Cut Yellow Golden Citrine Gem (ID: 456550)
2.70 ct Citrine
10.2 x 8.1 mm
$ 18.90
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2.8ct Cushion Checkerboard Lively Green Peridot Gem (ID: 332294)
2.81 ct Peridot
10 x 8.1 mm
$ 101.16
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2.5ct Cushion-Cut Yellow Golden Citrine Gem (ID: 439392)
2.45 ct Citrine
9.9 x 7.8 mm
$ 17.15
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2.6ct Cushion Checkerboard Lively Green Peridot Gem (ID: 335758)
2.57 ct Peridot
9.9 x 8.1 mm
$ 92.52
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2.8ct Cushion Checkerboard Lively Green Peridot Gem (ID: 334421)
2.78 ct Peridot
9.8 x 8 mm
$ 100.08
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2.8ct Cushion-Cut Golden Yellow Apatite Gem (ID: 408232)
2.80 ct Apatite
10.3 x 8.2 mm
$ 70.00
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2.8ct Cushion Checkerboard Lively Green Peridot Gem (ID: 334418)
2.80 ct Peridot
10 x 8.1 mm
$ 100.80
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2.8ct Cushion Checkerboard Lively Green Peridot Gem (ID: 334155)
2.78 ct Peridot
10.1 x 8.1 mm
$ 100.08
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2.8ct Cushion-Cut Yellow Golden Citrine Gem (ID: 456468)
2.83 ct Citrine
10.2 x 8 mm
$ 19.81
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3.1ct Cushion-Cut Lively Green Peridot Gem (ID: 438081)
3.10 ct Peridot
9.7 x 7.7 mm
$ 108.50
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2.7ct Cushion Checkerboard Lively Green Peridot Gem (ID: 333949)
2.73 ct Peridot
9.9 x 8 mm
$ 98.28
Item in Stock
1 2
Cushion Shape 10x8 mm Gems
Some people by gems by color or prize, 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 10 mm x 8 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.

Certified Customer Reviews
Overall Rating -> 9 star ratings
My selection was made quickly and efficiently.
Posted By JimC in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
GemSelect has a great selection at reasonable prices. Gemstones are always as beautiful as pictured.
Posted By GemLover in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Colors and qualities of gems are very well represented online. Easy to use website. Great selections!
Posted By in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
This was my second purchase from GemSelect and definitely won’t be my last! They have a very wide variety of gems and you can always find what you are looking for with ease and the prices are very good.
Posted By Jill in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Loved the wide selection of product
Posted By Miki in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
finally bought the last rock to complete my ring idea; needed another white one after giving the big diamond to my daughter. a diamond that size is out of my retired-school-teacher budget, so i bought a white zircon. went back to the same place that i got my loose sapphire-- great selection, good prices, good delivery!
Posted By Ptcmom in November, 2018
Source: Bizrate
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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