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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (807): Round Shape 8 mm Gems Clear All
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ID: 4328871 pcs
2.14ct Hessonite Garnet
8.17mm x 4.28mm
USD 27.39
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ID: 3051942 pcs
3.86ctw Prehnite
8.02mm x 6.14mm
USD 19.30
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ID: 4000534 pcs
6.42ctw Smoky Quartz
7.92mm x 5.04mm
USD 44.94
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ID: 4216801 pcs
2.54ct Topaz
8.12mm x 5.21mm
USD 17.78
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ID: 3631124 pcs
7.27ctw Amethyst
8.12mm x 3.85mm
USD 36.35
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ID: 3282871 pcs
3.40ct Pearl
7.86mm
USD 18.70
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ID: 3385472 pcs
9.32ctw Topaz
8.07mm
USD 68.78
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ID: 2281141 pcs
1.95ct Prehnite
7.85mm x 5.63mm
USD 8.78
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ID: 3174512 pcs
6.75ctw Pearl
7.71mm
USD 33.75
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ID: 4285972 pcs
3.76ctw Smoky Quartz
8.08mm x 5.64mm
USD 7.52
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ID: 3678622 pcs
5.93ctw Prehnite
8.15mm x 5.71mm
USD 29.41
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ID: 3052251 pcs
1.71ct Prehnite
7.88mm x 5.15mm
USD 8.55
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ID: 4285962 pcs
4.08ctw Smoky Quartz
8.00mm x 6.10mm
USD 8.16
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ID: 3780741 pcs
2.51ct Zircon
7.87mm x 5.09mm
USD 67.42
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ID: 3637211 pcs
2.60ct Amethyst
8.13mm x 5.36mm
USD 13.00
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ID: 4028222 pcs
4.47ctw Mystic Topaz
8.02mm x 4.70mm
USD 39.29
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ID: 3694822 pcs
4.34ctw Amethyst
8.03mm x 4.60mm
USD 21.70
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ID: 3052431 pcs
1.91ct Prehnite
8.01mm x 5.46mm
USD 9.55
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ID: 3895332 pcs
4.63ctw Topaz
8.15mm x 4.59mm
USD 32.41
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ID: 4280421 pcs
1.91ct Smoky Quartz
8.06mm x 5.76mm
USD 3.82
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ID: 3383982 pcs
8.52ctw Topaz
7.71mm
USD 62.88
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Round Shape 8 mm Gems
Some people by gems by color or price, but for many, it is best to buy gems by shape and size - especially if you're in need of a gem to replace a previous item that was lost or damaged. Calibrated Round shapes, facet cut and cabochon gems available now in 8 mm diameter 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 usually 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