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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (102): Octagon Shape 5x3 mm Gems Clear All
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ID: 3747564 pcs
1.74ctw Sapphire
4.99mm x 3.05mm x 2.64mm
USD 73.86
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ID: 34997120 pcs
6.57ctw Sapphire
4.83mm x 3.11mm x 2.08mm
USD 229.95
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ID: 3350276 pcs
1.94ctw Sapphire
4.97mm x 2.95mm x 2.04mm
USD 67.90
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ID: 3350176 pcs
2.05ctw Sapphire
4.93mm x 3.01mm x 2.10mm
USD 71.75
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ID: 3350286 pcs
2.07ctw Sapphire
4.95mm x 3.03mm x 2.09mm
USD 72.45
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ID: 3750304 pcs
1.69ctw Sapphire
4.97mm x 3.01mm x 2.61mm
USD 71.74
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ID: 3349356 pcs
1.98ctw Sapphire
4.92mm x 3.01mm x 2.13mm
USD 69.30
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ID: 39980715 pcs
5.09ctw Topaz
5.14mm x 3.01mm x 2.31mm
USD 35.63
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ID: 3350266 pcs
1.86ctw Sapphire
4.92mm x 2.99mm x 1.92mm
USD 65.10
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ID: 41242810 pcs
2.21ctw Iolite
5.00mm x 2.96mm x 2.09mm
USD 44.20
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ID: 4122548 pcs
2.05ctw Iolite
4.97mm x 3.06mm x 2.31mm
USD 41.00
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ID: 39971610 pcs
3.32ctw Topaz
5.07mm x 3.11mm x 2.22mm
USD 23.24
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ID: 3747156 pcs
2.16ctw Sapphire
5.02mm x 3.02mm x 2.33mm
USD 91.69
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ID: 3750285 pcs
1.85ctw Sapphire
5.02mm x 3.04mm x 2.24mm
USD 78.53
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ID: 3750294 pcs
1.63ctw Sapphire
5.12mm x 3.08mm x 2.28mm
USD 69.19
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ID: 3747146 pcs
2.33ctw Sapphire
5.03mm x 3.08mm x 2.23mm
USD 98.91
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ID: 34996520 pcs
6.73ctw Sapphire
5.03mm x 2.88mm x 2.18mm
USD 235.55
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ID: 4125177 pcs
2.70ctw Sapphire
5.07mm x 3.12mm x 2.63mm
USD 108.00
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ID: 4125776 pcs
1.98ctw Sapphire
4.93mm x 2.93mm x 2.12mm
USD 79.20
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ID: 39970910 pcs
3.06ctw Topaz
5.04mm x 3.05mm x 2.10mm
USD 21.42
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ID: 34996720 pcs
6.42ctw Sapphire
4.93mm x 2.88mm x 1.96mm
USD 224.70
Item in Stock
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Octagon Shape 5x3 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 5 x 3 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