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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (161): Octagon Shape 8x6 mm Gems Clear All
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ID: 3941812 pcs
3.37ctw Hessonite Garnet
7.97mm x 6.12mm x 3.61mm
USD 47.01
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ID: 3941782 pcs
3.59ctw Hessonite Garnet
7.94mm x 5.96mm x 3.86mm
USD 50.08
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ID: 3722814 pcs
7.31ctw Topaz
8.03mm x 6.03mm x 3.68mm
USD 51.17
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ID: 3948712 pcs
2.97ctw Hessonite Garnet
7.80mm x 5.83mm x 3.50mm
USD 41.08
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ID: 3723304 pcs
7.76ctw Topaz
8.14mm x 6.13mm x 4.07mm
USD 54.32
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ID: 3345752 pcs
3.96ctw Topaz
8.00mm x 6.04mm x 4.02mm
USD 25.65
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ID: 3815124 pcs
8.18ctw Topaz
8.02mm x 6.06mm x 4.12mm
USD 57.26
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ID: 3722734 pcs
7.95ctw Topaz
8.09mm x 6.13mm x 4.20mm
USD 55.65
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ID: 3813991 pcs
1.86ct Topaz
7.87mm x 5.89mm x 4.08mm
USD 13.02
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ID: 4093511 pcs
1.09ct Aquamarine
8.10mm x 5.76mm x 3.31mm
USD 89.94
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ID: 3673442 pcs
3.80ctw Topaz
8.11mm x 6.09mm x 4.22mm
USD 24.21
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ID: 3724184 pcs
8.25ctw Topaz
7.93mm x 6.01mm x 4.34mm
USD 57.75
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ID: 3731554 pcs
8.41ctw Topaz
8.07mm x 6.09mm x 4.13mm
USD 51.13
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ID: 3948642 pcs
3.13ctw Hessonite Garnet
8.10mm x 6.18mm x 3.11mm
USD 43.29
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ID: 4307201 pcs
2.38ct Zircon
8.24mm x 5.99mm x 3.57mm
USD 83.30
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ID: 3470502 pcs
3.77ctw Topaz
8.06mm x 5.96mm x 4.07mm
USD 24.09
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ID: 3723264 pcs
7.79ctw Topaz
8.03mm x 6.03mm x 4.09mm
USD 54.53
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ID: 3723704 pcs
7.79ctw Topaz
8.10mm x 6.11mm x 4.02mm
USD 54.53
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ID: 3673572 pcs
3.98ctw Topaz
8.15mm x 6.07mm x 4.28mm
USD 25.35
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ID: 3659052 pcs
3.86ctw Topaz
8.21mm x 6.16mm x 3.92mm
USD 23.74
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ID: 3723274 pcs
7.65ctw Topaz
8.10mm x 6.05mm x 4.00mm
USD 53.55
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Octagon Shape 8x6 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 Octagon Shape / Emerald-cut, faceted and cabochon gems available now in 8 x 6 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 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 round shape settings will allow 0.3 mm or slightly higher even. This small variance can usually be accommodated for most 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