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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (160): Octagon Shape 10x8 mm Gems Clear All
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thumb image of 3.7ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 492821)
3.65 ct Mystic Topaz
10.1 x 8 mm
$ 25.55
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2 pcs
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thumb image of 3.7ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489638)
3.73 ct (total 7.46ctw) Mystic Topaz
9.9 x 8 mm
$ 58.34
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thumb image of 3.7ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489625)
3.73 ct Mystic Topaz
9.9 x 7.8 mm
$ 29.17
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thumb image of 4ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489178)
3.98 ct Mystic Topaz
10 x 8 mm
$ 31.00
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2 pcs
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thumb image of 3.8ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489650)
3.83 ct (total 7.66ctw) Mystic Topaz
9.9 x 8.1 mm
$ 59.90
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thumb image of 3.9ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489533)
3.92 ct Mystic Topaz
10 x 8 mm
$ 30.65
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2 pcs
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thumb image of 4.1ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489478)
4.10 ct (total 8.20ctw) Mystic Topaz
9.9 x 8.1 mm
$ 63.88
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2 pcs
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thumb image of 3.4ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489477)
3.41 ct (total 6.82ctw) Mystic Topaz
9.9 x 8 mm
$ 53.13
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thumb image of 3.9ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489525)
3.94 ct Mystic Topaz
9.9 x 8 mm
$ 30.81
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2 pcs
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thumb image of 3.7ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489485)
3.71 ct (total 7.42ctw) Mystic Topaz
10 x 8 mm
$ 57.80
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2 pcs
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thumb image of 4ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489640)
3.95 ct (total 7.90ctw) Mystic Topaz
10.1 x 8 mm
$ 61.78
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2 pcs
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thumb image of 3.6ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489476)
3.63 ct (total 7.26ctw) Mystic Topaz
10 x 8 mm
$ 56.56
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thumb image of 4.1ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489554)
4.08 ct Mystic Topaz
10.1 x 8.1 mm
$ 31.91
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2 pcs
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thumb image of 3.9ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489646)
3.89 ct (total 7.77ctw) Mystic Topaz
10 x 8.1 mm
$ 60.76
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thumb image of 4ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489182)
3.97 ct Mystic Topaz
9.9 x 8.1 mm
$ 30.93
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thumb image of 3.9ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489466)
3.93 ct Mystic Topaz
10 x 8 mm
$ 30.61
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thumb image of 3.7ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489457)
3.70 ct Mystic Topaz
10.1 x 8 mm
$ 28.82
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thumb image of 3.1ct Octagon Facet Swiss Blue Topaz (ID: 419370)
3.08 ct Topaz
9.9 x 7.9 mm
$ 21.56
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thumb image of 3.3ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489555)
3.31 ct Mystic Topaz
9.9 x 8 mm
$ 25.88
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2 pcs
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thumb image of 4ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 489643)
3.97 ct (total 7.93ctw) Mystic Topaz
10 x 8.2 mm
$ 62.01
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thumb image of 4.2ct Octagon Step Cut Purplish Pink Mystic Topaz (ID: 492949)
4.22 ct Mystic Topaz
10 x 8.1 mm
$ 29.54
Item in Stock
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Octagon Shape 10x8 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 10 x 8 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.

Certified Customer Reviews
Overall Rating -> 10 star ratings
offer military prices
Posted By Frobb1968 in August, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Trustworthy company & site, great products.
Posted By KM in August, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I have been ordering from GemSelect for at least 6 years. Every single order was perfect - every item was as advertized, in perfect condition and arrived well within the specified time frame. I have recommended them to several friends.
Posted By Jim in August, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Excellent company with excellent website!
Posted By Marcy in August, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Happy with price and ease of purchase. Will tell others
Posted By JJ Kool Juan in August, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Very pleased with my purchase in all aspects!!!!!
Posted By JJ Kool Juan in August, 2018
Source: Bizrate
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International:
+66-39303404

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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