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Buy Octagon Shape 12x10 mm Gems

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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (91): Octagon Shape 12x10 mm Gems Clear All
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Green Agate Gem - 6ct Octagon Step Cut (ID: 468682)

Octagon / Emerald Cut Green Agate

6ct
12.2 x 10.1 mm
$ 12.08
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Golden Green Apatite Gem - 5.3ct Octagon Facet (ID: 407841)

Octagon / Emerald Cut Green Apatite

5.3ct
11.6 x 10.4 mm
$ 221.88
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Yellow Golden Citrine Gem - 5ct Octagon Step Cut (ID: 460723)

Octagon / Emerald Cut Yellow Citrine

5ct
11.9 x 9.9 mm
$ 34.93
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Yellow Golden Citrine Gem - 7.1ct Octagon Step Cut (ID: 460618)

Octagon / Emerald Cut Yellow Citrine

7.1ct
12 x 9.9 mm
$ 49.91
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Green Agate Gem - 5.8ct Octagon Step Cut (ID: 468689)

Octagon / Emerald Cut Green Agate

5.8ct
12.1 x 10 mm
$ 11.66
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Yellow Golden Citrine Gem - 5ct Octagon Step Cut (ID: 460721)

Octagon / Emerald Cut Yellow Citrine

5ct
11.9 x 9.9 mm
$ 34.65
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Yellow Golden Citrine Gem - 4.2ct Octagon Step Cut (ID: 465684)

Octagon / Emerald Cut Yellow Citrine

4.2ct
12 x 9.9 mm
$ 25.89
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Green Agate Gem - 5.3ct Octagon Step Cut (ID: 478260)

Octagon / Emerald Cut Green Agate

5.3ct
12.2 x 10 mm
$ 10.64
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Green Agate Gem - 5.4ct Octagon Step Cut (ID: 477913)

Octagon / Emerald Cut Green Agate

5.4ct
12.2 x 10.2 mm
$ 10.72
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Green Agate Gem - 5.8ct Octagon Step Cut (ID: 478341)

Octagon / Emerald Cut Green Agate

5.8ct
12.2 x 10.1 mm
$ 11.54
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Green Agate Gem - 4.9ct Octagon Step Cut (ID: 478196)

Octagon / Emerald Cut Green Agate

4.9ct
12.1 x 10 mm
$ 9.80
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Green Agate Gem - 5.1ct Octagon Step Cut (ID: 468739)

Octagon / Emerald Cut Green Agate

5.1ct
12.2 x 10 mm
$ 10.12
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Green Agate Gem - 5.8ct Octagon Step Cut (ID: 478203)

Octagon / Emerald Cut Green Agate

5.8ct
12.1 x 10.2 mm
$ 11.60
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Green Agate Gem - 5.9ct Octagon Step Cut (ID: 478258)

Octagon / Emerald Cut Green Agate

5.9ct
12.2 x 10.1 mm
$ 11.72
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Green Agate Gem - 6.2ct Octagon Step Cut (ID: 478340)

Octagon / Emerald Cut Green Agate

6.2ct
12.1 x 10.2 mm
$ 12.46
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Green Agate Gem - 5.7ct Octagon Step Cut (ID: 478072)

Octagon / Emerald Cut Green Agate

5.7ct
12.1 x 10 mm
$ 11.44
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Green Agate Gem - 5.1ct Octagon Step Cut (ID: 468691)

Octagon / Emerald Cut Green Agate

5.1ct
12 x 10.2 mm
$ 10.24
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Green Agate Gem - 5.5ct Octagon Step Cut (ID: 478259)

Octagon / Emerald Cut Green Agate

5.5ct
12 x 10.1 mm
$ 11.08
Item in Stock
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Yellow Golden Citrine Gem - 6ct Octagon Step Cut (ID: 460778)

Octagon / Emerald Cut Yellow Citrine

6ct
12.1 x 10.2 mm
$ 41.79
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Yellow Golden Citrine Gem - 5.2ct Octagon Step Cut (ID: 461313)

Octagon / Emerald Cut Yellow Citrine

5.2ct
11.7 x 9.6 mm
$ 36.61
Item in Stock
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Yellow Golden Citrine Gem - 6ct Octagon Step Cut (ID: 460621)

Octagon / Emerald Cut Yellow Citrine

6ct
12 x 10.1 mm
$ 42.28
Item in Stock
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Octagon Shape 12x10 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 12 x 10 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
man their gems are pretty good, and the prices aren't to bad either, I like checking out hte gems on there website, beceause the pictures of the gems are taken pretty well, and you can see the table, and the facets.
Posted By Spinach in March, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I love gemselect and I have bought a fair amount from them. The only complaint I have is not being able to save gems. I have a lot of projects so i am in the market for a lot of different gems and it's so disappointing to have to delete them all just to purchase one or two that I have saved in my cart.
Posted By S.Hicks in March, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I always check this site because they have unique options.
Posted By Lisa in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Great website to navigate. Awesome Gem selection! Nice photos and discriptions for all of the gems for sale. You can find gems in all price ranges. Checkout was a breeze.
Posted By Timmy in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
They had an extensive gemstone selection in all different cuts, sizes, and colors. They also had very good and workable prices. All of these aspects pulled me in as a customer.
Posted By Josh in February, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
It all depend on the product I will receive and have it verified by my in law jewellers.
Posted By Vodka in February, 2019
Source: Bizrate
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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