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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (962): Round Shape 8 mm Gems Clear All
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ID: 4554092 pcs
thumb image of 4.7ct Round Facet Sky Blue Topaz (ID: 455409)
4.67 ct Topaz
8.1 mm
$ 32.69
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ID: 4372142 pcs
thumb image of 4ct Round Checkerboard Brown Smoky Quartz (ID: 437214)
3.97 ct Smoky Quartz
8.1 mm
$ 5.96
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ID: 4480742 pcs
thumb image of 3.6ct Round Checkerboard Brown Smoky Quartz (ID: 448074)
3.58 ct Smoky Quartz
7.9 mm
$ 14.32
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ID: 4554042 pcs
thumb image of 4.6ct Round Facet Sky Blue Topaz (ID: 455404)
4.57 ct Topaz
8.1 mm
$ 31.99
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ID: 4000882 pcs
thumb image of 4.9ct Round Cabochon Cream Moonstone (ID: 400088)
4.88 ct Moonstone
8 mm
$ 48.80
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ID: 2486825 pcs
thumb image of 10ct Round Checkerboard Green Prehnite (ID: 248682)
9.97 ct Prehnite
7.9 mm
$ 44.86
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ID: 4483531 pcs
thumb image of 1.5ct Round Checkerboard Brown Smoky Quartz (ID: 448353)
1.52 ct Smoky Quartz
8.1 mm
$ 6.08
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ID: 4431781 pcs
thumb image of 1.6ct Round Checkerboard Brown Smoky Quartz (ID: 443178)
1.62 ct Smoky Quartz
8 mm
$ 3.24
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ID: 4283302 pcs
thumb image of 3.8ct Round Checkerboard Brown Smoky Quartz (ID: 428330)
3.81 ct Smoky Quartz
8 mm
$ 7.62
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ID: 4373202 pcs
thumb image of 3.7ct Round Checkerboard Brown Smoky Quartz (ID: 437320)
3.66 ct Smoky Quartz
8 mm
$ 5.49
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ID: 4430622 pcs
thumb image of 3.4ct Round Checkerboard Brown Smoky Quartz (ID: 443062)
3.40 ct Smoky Quartz
8 mm
$ 6.80
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ID: 4373182 pcs
thumb image of 3.7ct Round Checkerboard Brown Smoky Quartz (ID: 437318)
3.74 ct Smoky Quartz
8.1 mm
$ 5.61
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ID: 4521942 pcs
thumb image of 4.9ct Round Facet Sky Blue Topaz (ID: 452194)
4.92 ct Topaz
8.2 mm
$ 31.49
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ID: 3631114 pcs
thumb image of 9.1ct Round Cabochon Purple Amethyst (ID: 363111)
9.08 ct Amethyst
8.1 mm
$ 45.40
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ID: 4555102 pcs
thumb image of 4.3ct Round Facet Sky Blue Topaz (ID: 455510)
4.31 ct Topaz
8.1 mm
$ 30.17
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ID: 4398282 pcs
thumb image of 3.5ct Round Checkerboard Brown Smoky Quartz (ID: 439828)
3.48 ct Smoky Quartz
7.9 mm
$ 5.22
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ID: 4369922 pcs
thumb image of 3.6ct Round Checkerboard Brown Smoky Quartz (ID: 436992)
3.63 ct Smoky Quartz
7.9 mm
$ 5.44
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ID: 3895332 pcs
thumb image of 4.6ct Round Facet Swiss Blue Topaz (ID: 389533)
4.63 ct Topaz
8.2 mm
$ 32.41
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ID: 4282551 pcs
thumb image of 2ct Round Checkerboard Brown Smoky Quartz (ID: 428255)
2.02 ct Smoky Quartz
8 mm
$ 4.04
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ID: 4326861 pcs
thumb image of 2.3ct Round Facet Cinnamon Orange Hessonite Garnet (ID: 432686)
2.34 ct Hessonite Garnet
8.2 mm
$ 29.95
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ID: 4559562 pcs
thumb image of 4.3ct Round Facet Sky Blue Topaz (ID: 455956)
4.31 ct Topaz
8 mm
$ 30.17
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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