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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (92): Octagon Shape 10x8 mm Gems Clear All
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ID: 4051661 pcs
3.91ct Topaz
9.85mm x 7.99mm x 5.37mm
USD 27.17
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ID: 4184922 pcs
7.53ctw Topaz
9.85mm x 7.83mm x 4.98mm
USD 52.71
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ID: 3864472 pcs
7.16ctw Topaz
9.98mm x 7.99mm x 5.12mm
USD 35.80
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ID: 3868041 pcs
3.44ct Topaz
9.98mm x 7.97mm x 4.98mm
USD 17.20
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ID: 3865372 pcs
6.98ctw Topaz
10.00mm x 7.94mm x 4.76mm
USD 34.90
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ID: 4184841 pcs
4.44ct Topaz
9.93mm x 8.00mm x 5.30mm
USD 31.08
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ID: 4193692 pcs
7.33ctw Topaz
9.98mm x 7.92mm x 5.01mm
USD 51.31
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ID: 4184791 pcs
3.83ct Topaz
9.85mm x 7.99mm x 5.00mm
USD 26.81
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ID: 4051621 pcs
3.52ct Topaz
9.97mm x 8.11mm x 4.58mm
USD 24.46
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ID: 3864492 pcs
7.29ctw Topaz
10.04mm x 7.97mm x 5.18mm
USD 36.45
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ID: 3865872 pcs
6.61ctw Topaz
10.06mm x 7.92mm x 4.42mm
USD 33.05
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ID: 4184981 pcs
3.69ct Topaz
9.88mm x 7.81mm x 4.97mm
USD 25.83
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ID: 4188382 pcs
6.39ctw Topaz
9.89mm x 7.94mm x 4.66mm
USD 44.73
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ID: 3862932 pcs
6.61ctw Topaz
10.07mm x 8.02mm x 4.63mm
USD 33.05
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ID: 4051631 pcs
3.47ct Topaz
9.94mm x 8.00mm x 5.03mm
USD 24.12
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ID: 4184771 pcs
3.98ct Topaz
9.92mm x 7.95mm x 5.36mm
USD 27.86
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ID: 4051641 pcs
4.05ct Topaz
10.03mm x 7.98mm x 5.38mm
USD 28.15
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ID: 4185011 pcs
3.80ct Topaz
10.15mm x 8.05mm x 5.30mm
USD 26.60
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ID: 3865392 pcs
7.70ctw Topaz
9.99mm x 8.03mm x 5.33mm
USD 38.50
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ID: 3862892 pcs
7.35ctw Topaz
9.99mm x 7.98mm x 5.07mm
USD 36.75
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ID: 4193262 pcs
6.93ctw Topaz
10.11mm x 7.95mm x 4.59mm
USD 48.51
Item in Stock
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Octagon Shape 10x8 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 10 x 8 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