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You Selected (97): Octagon Shape 5x3 mm Gems Clear All
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ID: 34996720 pcs
thumb image of 6.4ct Octagon / Scissor Cut Multicolor Sapphire (ID: 349967)
6.42ct Sapphire
4.93 x 2.88 x 1.96mm
USD 224.70
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ID: 3747564 pcs
thumb image of 1.7ct Octagon / Scissor Cut Green Sapphire (ID: 374756)
1.74ct Sapphire
4.99 x 3.05 x 2.64mm
USD 73.86
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ID: 4125218 pcs
thumb image of 3ct Octagon Facet Multicolor Sapphire (ID: 412521)
2.95ct Sapphire
5.10 x 3.08 x 2.13mm
USD 118.00
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ID: 39980812 pcs
thumb image of 4.1ct Octagon Facet Swiss Blue Topaz (ID: 399808)
4.10ct Topaz
4.88 x 2.93 x 2.47mm
USD 28.70
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ID: 3350296 pcs
thumb image of 1.9ct Octagon / Scissor Cut Multicolor Sapphire (ID: 335029)
1.86ct Sapphire
4.93 x 2.97 x 1.93mm
USD 65.10
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ID: 4125157 pcs
thumb image of 2.2ct Octagon / Scissor Cut Multicolor Sapphire (ID: 412515)
2.18ct Sapphire
4.83 x 3.03 x 2.11mm
USD 87.20
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ID: 3750245 pcs
thumb image of 1.9ct Octagon / Scissor Cut Purple Pink Sapphire (ID: 375024)
1.91ct Sapphire
5.05 x 3.08 x 2.12mm
USD 81.08
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ID: 3750325 pcs
thumb image of 2ct Octagon / Scissor Cut Yellow Golden Sapphire (ID: 375032)
1.97ct Sapphire
5.18 x 3.10 x 2.51mm
USD 83.63
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ID: 3750215 pcs
thumb image of 1.8ct Octagon / Scissor Cut Multicolor Sapphire (ID: 375021)
1.84ct Sapphire
4.94 x 3.08 x 2.34mm
USD 78.11
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ID: 4125776 pcs
thumb image of 2ct Octagon Facet Multicolor Sapphire (ID: 412577)
1.98ct Sapphire
4.93 x 2.93 x 2.12mm
USD 79.20
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ID: 3350176 pcs
thumb image of 2.1ct Octagon / Scissor Cut Multicolor Sapphire (ID: 335017)
2.05ct Sapphire
4.93 x 3.01 x 2.10mm
USD 71.75
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ID: 4122548 pcs
thumb image of 2.1ct Octagon Facet Violet Blue Iolite (ID: 412254)
2.05ct Iolite
4.97 x 3.06 x 2.31mm
USD 41.00
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ID: 4125208 pcs
thumb image of 2.9ct Octagon / Scissor Cut Multicolor Sapphire (ID: 412520)
2.90ct Sapphire
4.97 x 3.03 x 2.17mm
USD 116.00
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ID: 3349426 pcs
thumb image of 1.7ct Octagon / Scissor Cut Multicolor Sapphire (ID: 334942)
1.74ct Sapphire
4.99 x 2.96 x 1.74mm
USD 60.90
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ID: 3747136 pcs
thumb image of 2.4ct Octagon / Scissor Cut Multicolor Sapphire (ID: 374713)
2.39ct Sapphire
5.00 x 3.10 x 2.29mm
USD 101.46
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ID: 39971210 pcs
thumb image of 3.9ct Octagon Facet Swiss Blue Topaz (ID: 399712)
3.86ct Topaz
5.08 x 3.11 x 2.47mm
USD 27.02
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ID: 34997020 pcs
thumb image of 7.1ct Octagon / Scissor Cut Multicolor Sapphire (ID: 349970)
7.07ct Sapphire
4.98 x 3.02 x 1.93mm
USD 247.45
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ID: 39971910 pcs
thumb image of 3.3ct Octagon Facet Swiss Blue Topaz (ID: 399719)
3.29ct Topaz
4.92 x 2.95 x 2.33mm
USD 23.03
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ID: 3349316 pcs
thumb image of 1.8ct Octagon / Scissor Cut Multicolor Sapphire (ID: 334931)
1.76ct Sapphire
4.91 x 3.01 x 1.85mm
USD 61.60
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ID: 2551315 pcs
thumb image of 1.4ct Octagon Facet Violet Iolite (ID: 255131)
1.39ct Iolite
4.99 x 3.08 x 2.44mm
USD 14.60
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ID: 39971310 pcs
thumb image of 3.5ct Octagon Facet Swiss Blue Topaz (ID: 399713)
3.49ct Topaz
5.05 x 3.06 x 2.38mm
USD 24.43
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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