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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (338): Round Shape 8 mm Gems Clear All
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ID: 4280401 pcs
thumb image of 2ct Round Checkerboard Brown Smoky Quartz (ID: 428040)
2.02 ct Smoky Quartz
7.9 mm
$ 4.04
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ID: 3988002 pcs
thumb image of 3.6ct Round Checkerboard Brown Smoky Quartz (ID: 398800)
3.56 ct Smoky Quartz
8 mm
$ 24.92
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ID: 3988022 pcs
thumb image of 3.4ct Round Checkerboard Brown Smoky Quartz (ID: 398802)
3.38 ct Smoky Quartz
8 mm
$ 23.66
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ID: 4482142 pcs
thumb image of 3.9ct Round Checkerboard Brown Smoky Quartz (ID: 448214)
3.89 ct Smoky Quartz
8.1 mm
$ 15.56
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ID: 3988614 pcs
thumb image of 6.8ct Round Checkerboard Brown Smoky Quartz (ID: 398861)
6.78 ct Smoky Quartz
7.9 mm
$ 47.46
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ID: 3687871 pcs
thumb image of 2ct Round Cabochon Green Prehnite (ID: 368787)
1.98 ct Prehnite
7.9 mm
$ 9.74
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ID: 3670542 pcs
thumb image of 3.8ct Round Checkerboard Green Prehnite (ID: 367054)
3.76 ct Prehnite
7.9 mm
$ 18.80
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ID: 4429891 pcs
thumb image of 1.6ct Round Checkerboard Brown Smoky Quartz (ID: 442989)
1.60 ct Smoky Quartz
7.9 mm
$ 3.20
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ID: 4429931 pcs
thumb image of 1.9ct Round Checkerboard Brown Smoky Quartz (ID: 442993)
1.92 ct Smoky Quartz
7.9 mm
$ 3.84
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ID: 3987952 pcs
thumb image of 3.6ct Round Checkerboard Brown Smoky Quartz (ID: 398795)
3.61 ct Smoky Quartz
7.9 mm
$ 25.27
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ID: 4482122 pcs
thumb image of 3.1ct Round Checkerboard Brown Smoky Quartz (ID: 448212)
3.13 ct Smoky Quartz
7.9 mm
$ 12.52
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ID: 4483271 pcs
thumb image of 1.5ct Round Checkerboard Brown Smoky Quartz (ID: 448327)
1.53 ct Smoky Quartz
7.9 mm
$ 6.12
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ID: 3634352 pcs
thumb image of 5ct Round Cabochon Purple Amethyst (ID: 363435)
5.04 ct Amethyst
8.1 mm
$ 35.28
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ID: 3672524 pcs
thumb image of 7.1ct Round Checkerboard Green Prehnite (ID: 367252)
7.08 ct Prehnite
7.9 mm
$ 35.40
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ID: 3328081 pcs
thumb image of 2.6ct Round Facet Rose Malaya Garnet (ID: 332808)
2.63 ct Malaya Garnet
8.2 mm
$ 276.15
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ID: 3384762 pcs
thumb image of 9.5ct Spherical Swiss Blue Topaz (ID: 338476)
9.53 ct Topaz
7.9 mm
$ 70.33
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ID: 2676465 pcs
thumb image of 10.9ct Round Cabochon Yellow Golden Citrine (ID: 267646)
10.94 ct Citrine
8.2 mm
$ 65.64
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ID: 3631104 pcs
thumb image of 9.2ct Round Cabochon Purple Amethyst (ID: 363110)
9.23 ct Amethyst
8.1 mm
$ 46.15
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ID: 3383992 pcs
thumb image of 8.7ct Spherical Swiss Blue Topaz (ID: 338399)
8.70 ct Topaz
7.9 mm
$ 64.21
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ID: 3703784 pcs
thumb image of 9.4ct Round Cabochon Blue Lapis Lazuli (ID: 370378)
9.36 ct Lapis Lazuli
8.1 mm
$ 14.04
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ID: 3630724 pcs
thumb image of 8.1ct Round Cabochon Purple Amethyst (ID: 363072)
8.12 ct Amethyst
8.1 mm
$ 40.60
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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