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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (29): Cabochon Gemstones Clear All
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Black Gray Hematite Gem - 9.5ct Octagon Cabochon (ID: 515488)

Octagon / Emerald Cut Gray Hematite

9.5ct
16.2 x 12.5 mm
$ 9.47
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1 pc
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Black Gray Hematite Gem - 12.1ct Octagon Cabochon (ID: 498037)

Octagon / Emerald Cut Gray Hematite

12.1ct
20.2 x 15.3 mm
$ 10.12
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Black Gray Hematite Gem - 23.1ct Octagon Cabochon (ID: 498034)

Octagon / Emerald Cut Gray Hematite

23.1ct
21 x 15.5 mm
$ 19.44
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Black Gray Hematite Gem - 16.5ct Octagon Cabochon (ID: 498044)

Octagon / Emerald Cut Gray Hematite

16.5ct
19.8 x 15 mm
$ 13.86
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Black Gray Hematite Gem - 20.3ct Octagon Cabochon (ID: 498043)

Octagon / Emerald Cut Gray Hematite

20.3ct
21.5 x 15.8 mm
$ 17.07
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2 pcs
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Black Gray Hematite Gem - 11.7ct Octagon Cabochon (ID: 491901)

Octagon / Emerald Cut Gray Hematite

11.74 ct (total 23.47ctw)
18.3 x 14.2 mm
$ 20.89
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Black Gray Hematite Gem - 21.7ct Octagon Cabochon (ID: 498039)

Octagon / Emerald Cut Gray Hematite

21.7ct
20.5 x 12.2 mm
$ 18.21
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Black Gray Hematite Gem - 19.3ct Octagon Cabochon (ID: 498035)

Octagon / Emerald Cut Gray Hematite

19.3ct
21.1 x 16.3 mm
$ 16.19
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Spotted Green Bloodstone Gem - 21.6ct Octagon Cabochon (ID: 478586)

Octagon / Emerald Cut Green Bloodstone

21.6ct
16 x 12.2 mm
$ 43.12
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2 pcs
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Black Gray Hematite Gem - 18.4ct Octagon Cabochon (ID: 491900)

Octagon / Emerald Cut Gray Hematite

18.42 ct (total 36.84ctw)
19.2 x 14.6 mm
$ 32.79
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Black Gray Hematite Gem - 18.8ct Octagon Cabochon (ID: 491895)

Octagon / Emerald Cut Gray Hematite

18.76 ct (total 37.51ctw)
19.5 x 14.9 mm
$ 33.38
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Swiss Blue Topaz Gem - 3.4ct Octagon Cabochon (ID: 282737)

Octagon / Emerald Cut Blue Topaz

3.36 ct (total 13.44ctw)
9.9 x 7.6 mm
$ 80.64
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2 pcs
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Black Gray Hematite Gem - 16.2ct Octagon Cabochon (ID: 491899)

Octagon / Emerald Cut Gray Hematite

16.17 ct (total 32.33ctw)
18.3 x 13.8 mm
$ 28.77
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2 pcs
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Black Gray Hematite Gem - 17.4ct Octagon Cabochon (ID: 491893)

Octagon / Emerald Cut Gray Hematite

17.44 ct (total 34.87ctw)
19.4 x 15.1 mm
$ 31.03
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2 pcs
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Black Gray Hematite Gem - 13.8ct Octagon Cabochon (ID: 491897)

Octagon / Emerald Cut Gray Hematite

13.82 ct (total 27.63ctw)
18.8 x 14.1 mm
$ 24.59
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2 pcs
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Black Gray Hematite Gem - 20.6ct Octagon Cabochon (ID: 491902)

Octagon / Emerald Cut Gray Hematite

20.63 ct (total 41.25ctw)
19.8 x 15.1 mm
$ 36.71
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2 pcs
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Black Gray Hematite Gem - 8.9ct Octagon Cabochon (ID: 491894)

Octagon / Emerald Cut Gray Hematite

8.89 ct (total 17.78ctw)
15.3 x 10.7 mm
$ 15.82
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2 pcs
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Black Gray Hematite Gem - 20.3ct Octagon Cabochon (ID: 491896)

Octagon / Emerald Cut Gray Hematite

20.25 ct (total 40.49ctw)
20.2 x 15 mm
$ 36.04
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Black Gray Hematite Gem - 19ct Octagon Cabochon (ID: 515492)

Octagon / Emerald Cut Gray Hematite

19ct
20.3 x 15.8 mm
$ 18.98
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Black Gray Hematite Gem - 21.9ct Octagon Cabochon (ID: 515496)

Octagon / Emerald Cut Gray Hematite

21.9ct
19.9 x 13.9 mm
$ 21.90
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Black Gray Hematite Gem - 17.6ct Octagon Cabochon (ID: 515489)

Octagon / Emerald Cut Gray Hematite

17.6ct
19.7 x 14.4 mm
$ 17.55
Item in Stock
1 2
Cabochon Gemstones

What Makes a Cabochon?

A Gemstone cut Cabochon has a highly polished rounded or slightly domed convex top with no faceting and a flat or slightly domed base. Some Cabochons may even have undulating surfaces.

What are Gemstones That are Cut Differently Called?

A Gemstone with a flat bottom and a faceted domed top are Rose-Cut Gems. A gemstone with a faceted pavilion, but featuring the smooth domed top of a cabochon are known as Buff-Top Gemstones.

What Gems are Available as Cabochons?

Gemstone Cabochons may be cut into any shape, though oval is the most frequent. The term, 'Cabochon' comes from the French 'Caboche' meaning small dome. Many of the 130+ Gem Types available at GemSelect are Cabochon including Opal, Jade, Turquoise, Onyx, Moonstone, and Star Sapphire. The word Cabochon is often shortened to "cab" by gem enthusiasts.

What Colors are Available and How Should They be Used in Jewelry?

Gemstone cabochons are available in pretty much every color of the rainbow and maybe star gems, cat's eye gems, transparent, translucent or opaque. Cabochons make great necklace pendants, gemstones rings, bracelets, earrings and more.

Tips for Filtering and Searching Cabochon Gems at GemSelect

To find your perfect cabochon gemstones, use the filters at the top left-hand side. You can search cabochons by gem type, variety, carat weight, size, price and other factors such as gem by color, to enable you to find the exact cabochon gemstone that you want. All of our listed items are in stock and ready to be shipped.

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