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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (104): Octagon Shape 5x3 mm Gems Clear All
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ID: 4124776 pcs
1.94ctw Sapphire
5.09mm x 3.03mm x 1.94mm
USD 97.00
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ID: 34996720 pcs
6.42ctw Sapphire
4.93mm x 2.88mm x 1.96mm
USD 224.70
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ID: 3349426 pcs
1.74ctw Sapphire
4.99mm x 2.96mm x 1.74mm
USD 60.90
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ID: 3749045 pcs
1.78ctw Sapphire
5.04mm x 3.04mm x 2.15mm
USD 75.56
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ID: 3749055 pcs
1.84ctw Sapphire
4.91mm x 2.93mm x 2.20mm
USD 78.11
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ID: 4124838 pcs
2.58ctw Sapphire
4.99mm x 3.03mm x 2.21mm
USD 129.00
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ID: 3350336 pcs
1.76ctw Sapphire
4.98mm x 3.00mm x 1.83mm
USD 61.60
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ID: 4124849 pcs
3.20ctw Sapphire
5.03mm x 3.08mm x 2.20mm
USD 160.00
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ID: 4125816 pcs
2.21ctw Sapphire
5.06mm x 3.09mm x 2.24mm
USD 88.40
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ID: 3350216 pcs
2.13ctw Sapphire
5.00mm x 2.97mm x 2.19mm
USD 74.55
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ID: 39971210 pcs
3.86ctw Topaz
5.08mm x 3.11mm x 2.47mm
USD 27.02
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ID: 4124806 pcs
2.29ctw Sapphire
5.02mm x 3.07mm x 2.29mm
USD 114.50
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ID: 3350346 pcs
1.98ctw Sapphire
4.91mm x 2.91mm x 2.13mm
USD 69.30
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ID: 34996920 pcs
6.41ctw Sapphire
4.97mm x 2.99mm x 2.25mm
USD 224.35
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ID: 3111936 pcs
2.07ctw Sapphire
5.09mm x 3.11mm x 1.99mm
USD 72.45
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ID: 4125736 pcs
2.36ctw Sapphire
5.04mm x 3.08mm x 2.42mm
USD 94.40
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ID: 39979215 pcs
5.06ctw Topaz
5.09mm x 3.10mm x 2.13mm
USD 35.42
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ID: 39980615 pcs
5.23ctw Topaz
5.09mm x 3.12mm x 2.44mm
USD 36.61
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ID: 4333974 pcs
0.83ctw Aquamarine
4.83mm x 3.03mm x 1.92mm
USD 24.90
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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: 3750285 pcs
1.85ctw Sapphire
5.02mm x 3.04mm x 2.24mm
USD 78.53
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