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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (182): Octagon Shape 7x5 mm Gems Clear All
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ID: 4482412 pcs
thumb image of 2.4ct Octagon Step Cut Swiss Blue Topaz (ID: 448241)
2.38 ct Topaz
7 x 5 mm
$ 15.54
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ID: 4481662 pcs
thumb image of 2.2ct Octagon Step Cut Swiss Blue Topaz (ID: 448166)
2.18 ct Topaz
7 x 5 mm
$ 14.24
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ID: 4297262 pcs
thumb image of 3.4ct Octagon Facet Orange Zircon (ID: 429726)
3.40 ct Zircon
7.1 x 5 mm
$ 51.00
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ID: 4482922 pcs
thumb image of 2ct Octagon Step Cut Swiss Blue Topaz (ID: 448292)
2.04 ct Topaz
6.9 x 5 mm
$ 13.32
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ID: 4305011 pcs
thumb image of 1.2ct Octagon Facet Orange Zircon (ID: 430501)
1.23 ct Zircon
7.2 x 4.9 mm
$ 30.75
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ID: 4480912 pcs
thumb image of 2.3ct Octagon Step Cut Swiss Blue Topaz (ID: 448091)
2.25 ct Topaz
6.9 x 5 mm
$ 14.69
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ID: 4298681 pcs
thumb image of 1.8ct Octagon Facet Orange Zircon (ID: 429868)
1.83 ct Zircon
7.2 x 5 mm
$ 27.45
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ID: 4304981 pcs
thumb image of 1.9ct Octagon Facet Orange Zircon (ID: 430498)
1.87 ct Zircon
7.2 x 5.1 mm
$ 46.75
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ID: 4299351 pcs
thumb image of 1.6ct Octagon Facet Orange Zircon (ID: 429935)
1.61 ct Zircon
7.1 x 5 mm
$ 24.15
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ID: 4052894 pcs
thumb image of 4.3ct Octagon Facet Swiss Blue Topaz (ID: 405289)
4.26 ct Topaz
7.1 x 5.1 mm
$ 29.61
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ID: 4480962 pcs
thumb image of 2ct Octagon Step Cut Swiss Blue Topaz (ID: 448096)
1.97 ct Topaz
7 x 5 mm
$ 12.86
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ID: 4483884 pcs
thumb image of 4.1ct Octagon Step Cut Swiss Blue Topaz (ID: 448388)
4.10 ct Topaz
6.9 x 4.9 mm
$ 26.77
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ID: 4480922 pcs
thumb image of 2.3ct Octagon Step Cut Swiss Blue Topaz (ID: 448092)
2.28 ct Topaz
7.1 x 5 mm
$ 14.89
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ID: 3789121 pcs
thumb image of 1ct Octagon Facet Yellowish Green Tourmaline (ID: 378912)
1.01 ct Tourmaline
7.1 x 5 mm
$ 45.96
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ID: 4297981 pcs
thumb image of 1.6ct Octagon Facet Orange Zircon (ID: 429798)
1.55 ct Zircon
7.1 x 5.1 mm
$ 23.25
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ID: 2751635 pcs
thumb image of 5.8ct Octagon Step Cut Yellow Golden Citrine (ID: 275163)
5.77 ct Citrine
7 x 5.1 mm
$ 30.29
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ID: 4483904 pcs
thumb image of 4.8ct Octagon Step Cut Swiss Blue Topaz (ID: 448390)
4.76 ct Topaz
7.2 x 5.1 mm
$ 31.08
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ID: 4052314 pcs
thumb image of 4.7ct Octagon Facet Swiss Blue Topaz (ID: 405231)
4.72 ct Topaz
7.1 x 5.1 mm
$ 32.80
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ID: 4481682 pcs
thumb image of 2.3ct Octagon Step Cut Swiss Blue Topaz (ID: 448168)
2.29 ct Topaz
7 x 5 mm
$ 14.95
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ID: 4482392 pcs
thumb image of 2.2ct Octagon Step Cut Swiss Blue Topaz (ID: 448239)
2.23 ct Topaz
7 x 5.1 mm
$ 14.56
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ID: 4483854 pcs
thumb image of 4.3ct Octagon Step Cut Swiss Blue Topaz (ID: 448385)
4.33 ct Topaz
6.9 x 5 mm
$ 28.27
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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