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You Selected (191): Octagon Shape 7x5 mm Gems Clear All
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ID: 4298711 pcs
thumb image of 1.6ct Octagon Facet Orange Zircon (ID: 429871)
1.64ct Zircon
7.13 x 4.87 x 3.32mm
USD 24.60
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ID: 3939882 pcs
thumb image of 2.2ct Octagon Facet Cinnamon Orange Hessonite Garnet (ID: 393988)
2.22ct Hessonite Garnet
6.77 x 4.96 x 3.18mm
USD 31.08
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ID: 3715276 pcs
thumb image of 6.6ct Octagon Facet Red Almandine Garnet (ID: 371527)
6.59ct Almandine Garnet
6.95 x 4.92 x 3.09mm
USD 32.95
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ID: 2756755 pcs
thumb image of 5.4ct Octagon Step Cut Yellow Golden Citrine (ID: 275675)
5.40ct Citrine
6.85 x 5.13 x 3.95mm
USD 28.35
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ID: 3965491 pcs
thumb image of 1.1ct Octagon Facet Green/Pink Color-Change Diaspore (ID: 396549)
1.09ct Color-Change Diaspore
6.97 x 4.86 x 3.59mm
USD 52.06
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ID: 4314891 pcs
thumb image of 1ct Octagon Facet Cinnamon Orange Hessonite Garnet (ID: 431489)
1.01ct Hessonite Garnet
6.93 x 5.17 x 2.94mm
USD 18.18
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ID: 3919302 pcs
thumb image of 2.6ct Octagon Facet Cinnamon Orange Hessonite Garnet (ID: 391930)
2.59ct Hessonite Garnet
7.00 x 5.18 x 3.69mm
USD 51.80
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ID: 4252571 pcs
thumb image of 1ct Octagon Facet Light Blue Aquamarine (ID: 425257)
0.99ct Aquamarine
7.13 x 5.02 x 3.47mm
USD 39.60
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ID: 3948672 pcs
thumb image of 3ct Octagon Facet Cinnamon Orange Hessonite Garnet (ID: 394867)
3.04ct Hessonite Garnet
7.07 x 5.16 x 3.75mm
USD 42.04
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ID: 2883894 pcs
thumb image of 4.9ct Octagon Facet Blue Kyanite (ID: 288389)
4.89ct Kyanite
7.13 x 5.12 x 3.32mm
USD 116.14
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ID: 4297262 pcs
thumb image of 3.4ct Octagon Facet Orange Zircon (ID: 429726)
3.40ct Zircon
7.10 x 5.03 x 3.42mm
USD 51.00
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ID: 4305001 pcs
thumb image of 1.5ct Octagon Facet Orange Zircon (ID: 430500)
1.51ct Zircon
7.16 x 4.84 x 3.26mm
USD 37.75
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ID: 4305011 pcs
thumb image of 1.2ct Octagon Facet Orange Zircon (ID: 430501)
1.23ct Zircon
7.17 x 4.91 x 2.60mm
USD 30.75
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ID: 3892431 pcs
thumb image of 0.9ct Octagon Facet Yellowish Green Kornerupine (ID: 389243)
0.90ct Kornerupine
7.06 x 5.13 x 2.94mm
USD 78.26
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ID: 3963381 pcs
thumb image of 0.9ct Octagon Facet Green/Pink Color-Change Diaspore (ID: 396338)
0.86ct Color-Change Diaspore
6.95 x 4.87 x 2.62mm
USD 41.07
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ID: 4476441 pcs
thumb image of 0.9ct Octagon Step Cut Green Emerald (ID: 447644)
0.92ct Emerald
7.05 x 4.98 x 3.52mm
USD 248.40
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ID: 3919344 pcs
thumb image of 5.1ct Octagon Facet Cinnamon Orange Hessonite Garnet (ID: 391934)
5.05ct Hessonite Garnet
6.80 x 4.95 x 3.83mm
USD 101.00
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ID: 2756895 pcs
thumb image of 4.8ct Octagon Step Cut Yellow Golden Citrine (ID: 275689)
4.82ct Citrine
6.83 x 5.03 x 3.93mm
USD 25.31
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ID: 4299361 pcs
thumb image of 1.6ct Octagon Facet Orange Zircon (ID: 429936)
1.56ct Zircon
7.27 x 5.06 x 2.92mm
USD 23.40
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ID: 37170212 pcs
thumb image of 13.4ct Octagon Facet Red Almandine Garnet (ID: 371702)
13.39ct Almandine Garnet
7.23 x 5.00 x 2.77mm
USD 66.95
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ID: 4052294 pcs
thumb image of 5ct Octagon Facet Swiss Blue Topaz (ID: 405229)
5.02ct Topaz
7.08 x 5.05 x 3.83mm
USD 34.89
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Octagon Shape 7x5 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 7 x 5 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