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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: 3747126 pcs
2.07ctw Sapphire
4.96 x 3.10 x 2.00mm
USD 87.87
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ID: 3750304 pcs
1.69ctw Sapphire
4.97 x 3.01 x 2.61mm
USD 71.74
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ID: 3750265 pcs
1.92ctw Sapphire
4.94 x 3.11 x 2.24mm
USD 81.50
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ID: 3750215 pcs
1.84ctw Sapphire
4.94 x 3.08 x 2.34mm
USD 78.11
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ID: 2551315 pcs
1.39ctw Iolite
4.99 x 3.08 x 2.44mm
USD 14.60
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ID: 3350826 pcs
1.95ctw Sapphire
5.05 x 3.06 x 1.98mm
USD 68.25
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ID: 3350176 pcs
2.05ctw Sapphire
4.93 x 3.01 x 2.10mm
USD 71.75
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ID: 34996820 pcs
6.09ctw Sapphire
4.98 x 3.02 x 2.23mm
USD 213.15
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ID: 41242810 pcs
2.21ctw Iolite
5.00 x 2.96 x 2.09mm
USD 44.20
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ID: 4125776 pcs
1.98ctw Sapphire
4.93 x 2.93 x 2.12mm
USD 79.20
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ID: 3349356 pcs
1.98ctw Sapphire
4.92 x 3.01 x 2.13mm
USD 69.30
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ID: 39971910 pcs
3.29ctw Topaz
4.92 x 2.95 x 2.33mm
USD 23.03
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ID: 3350266 pcs
1.86ctw Sapphire
4.92 x 2.99 x 1.92mm
USD 65.10
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ID: 4125816 pcs
2.21ctw Sapphire
5.06 x 3.09 x 2.24mm
USD 88.40
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ID: 3350306 pcs
2.17ctw Sapphire
5.01 x 3.09 x 2.11mm
USD 75.95
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ID: 39980715 pcs
5.09ctw Topaz
5.14 x 3.01 x 2.31mm
USD 35.63
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ID: 3349346 pcs
1.98ctw Sapphire
4.92 x 3.03 x 2.04mm
USD 69.30
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ID: 39980812 pcs
4.10ctw Topaz
4.88 x 2.93 x 2.47mm
USD 28.70
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ID: 4125705 pcs
1.76ctw Sapphire
5.04 x 3.06 x 2.02mm
USD 70.40
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ID: 3111936 pcs
2.07ctw Sapphire
5.09 x 3.11 x 1.99mm
USD 72.45
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ID: 39980615 pcs
5.23ctw Topaz
5.09 x 3.12 x 2.44mm
USD 36.61
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