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You Selected (60): Octagon Shape 5x3 mm Gems Clear All
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ID: 41242810 pcs
thumb image of 2.2ct Octagon Facet Violet Blue Iolite (ID: 412428)
2.21ct Iolite
5.00 x 2.96 x 2.09mm
USD 44.20
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ID: 39970910 pcs
thumb image of 3.1ct Octagon Facet Swiss Blue Topaz (ID: 399709)
3.06ct Topaz
5.04 x 3.05 x 2.10mm
USD 21.42
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ID: 3747534 pcs
thumb image of 1.4ct Octagon / Scissor Cut Multicolor Sapphire (ID: 374753)
1.36ct Sapphire
5.10 x 3.02 x 1.92mm
USD 57.73
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ID: 3749055 pcs
thumb image of 1.8ct Octagon / Scissor Cut Green Sapphire (ID: 374905)
1.84ct Sapphire
4.91 x 2.93 x 2.20mm
USD 78.11
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ID: 3350805 pcs
thumb image of 1.5ct Octagon / Scissor Cut Multicolor Sapphire (ID: 335080)
1.50ct Sapphire
4.93 x 2.97 x 2.04mm
USD 52.50
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ID: 4333974 pcs
thumb image of 0.8ct Octagon Facet Light Blue Aquamarine (ID: 433397)
0.83ct Aquamarine
4.83 x 3.03 x 1.92mm
USD 24.90
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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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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: 3747544 pcs
thumb image of 1.6ct Octagon / Scissor Cut Multicolor Sapphire (ID: 374754)
1.55ct Sapphire
5.02 x 3.04 x 2.38mm
USD 65.80
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ID: 2550845 pcs
thumb image of 1.5ct Octagon Step Cut Violet Iolite (ID: 255084)
1.45ct Iolite
4.92 x 3.00 x 2.65mm
USD 15.23
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ID: 4125736 pcs
thumb image of 2.4ct Octagon Facet Multicolor Sapphire (ID: 412573)
2.36ct Sapphire
5.04 x 3.08 x 2.42mm
USD 94.40
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ID: 3350166 pcs
thumb image of 2ct Octagon / Scissor Cut Multicolor Sapphire (ID: 335016)
2.00ct Sapphire
5.04 x 3.02 x 2.00mm
USD 70.00
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ID: 3349396 pcs
thumb image of 2.4ct Octagon / Scissor Cut Multicolor Sapphire (ID: 334939)
2.42ct Sapphire
5.06 x 3.10 x 2.30mm
USD 84.70
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ID: 3350286 pcs
thumb image of 2.1ct Octagon / Scissor Cut Multicolor Sapphire (ID: 335028)
2.07ct Sapphire
4.95 x 3.03 x 2.09mm
USD 72.45
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ID: 41242710 pcs
thumb image of 2.3ct Octagon Facet Violet Blue Iolite (ID: 412427)
2.26ct Iolite
4.89 x 2.93 x 2.18mm
USD 45.20
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ID: 4125112 pcs
thumb image of 0.7ct Octagon / Scissor Cut Yellow Golden Sapphire (ID: 412511)
0.73ct Sapphire
5.14 x 3.04 x 2.10mm
USD 29.20
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ID: 3350326 pcs
thumb image of 2ct Octagon / Scissor Cut Yellow Golden Sapphire (ID: 335032)
1.96ct Sapphire
4.91 x 3.03 x 2.02mm
USD 68.60
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ID: 4122568 pcs
thumb image of 2.2ct Octagon Facet Violet Blue Iolite (ID: 412256)
2.17ct Iolite
5.10 x 3.04 x 2.32mm
USD 43.40
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ID: 3350146 pcs
thumb image of 2.1ct Octagon / Scissor Cut Yellow Golden Sapphire (ID: 335014)
2.14ct Sapphire
4.89 x 2.99 x 2.30mm
USD 74.90
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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: 3349329 pcs
thumb image of 2.5ct Octagon / Scissor Cut Multicolor Sapphire (ID: 334932)
2.54ct Sapphire
4.93 x 3.01 x 1.72mm
USD 88.90
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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