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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (796): Round Shape 8 mm Gems Clear All
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ID: 4359881 pcs
2.11ct Tourmaline
8.07mm x 5.22mm
USD 327.58
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ID: 4285762 pcs
3.42ctw Smoky Quartz
7.91mm x 5.83mm
USD 6.84
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ID: 3132581 pcs
1.95ct Prehnite
7.97mm x 5.54mm
USD 8.78
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ID: 3247612 pcs
4.28ctw Topaz
8.05mm x 4.16mm
USD 31.46
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ID: 3685721 pcs
2.42ct Prehnite
7.93mm x 5.28mm
USD 11.91
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ID: 3988533 pcs
5.46ctw Smoky Quartz
7.86mm x 5.70mm
USD 38.22
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ID: 4280792 pcs
3.67ctw Smoky Quartz
7.97mm x 5.74mm
USD 7.34
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ID: 3672524 pcs
7.08ctw Prehnite
7.86mm x 5.36mm
USD 35.40
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ID: 4055461 pcs
3.77ct Zircon
7.68mm x 5.64mm
USD 93.23
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ID: 3330852 pcs
3.60ctw Citrine
8.12mm x 5.42mm
USD 26.46
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ID: 3497012 pcs
6.97ctw Pearl
7.97mm
USD 38.34
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ID: 4285752 pcs
3.29ctw Smoky Quartz
8.06mm x 4.61mm
USD 6.58
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ID: 3637211 pcs
2.60ct Amethyst
8.13mm x 5.36mm
USD 13.00
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ID: 4283312 pcs
3.81ctw Smoky Quartz
7.86mm x 5.59mm
USD 7.62
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ID: 4285982 pcs
4.14ctw Smoky Quartz
7.96mm x 6.68mm
USD 8.28
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ID: 4228151 pcs
2.06ct Golden Beryl
8.08mm x 5.57mm
USD 45.32
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ID: 3479372 pcs
3.54ctw Citrine
8.04mm x 5.07mm
USD 28.32
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ID: 43517612 pcs
43.38ctw Carnelian
8.12mm
USD 43.38
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ID: 3670512 pcs
3.51ctw Prehnite
7.85mm x 5.35mm
USD 17.55
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ID: 3244981 pcs
3.52ct Pearl
7.85mm
USD 19.36
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ID: 3767091 pcs
2.34ct Prehnite
7.78mm x 4.65mm
USD 13.78
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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