Calibrated 20 x 15 mm Octagon Shape Gemstones | GemSelect
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Bi-color
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Black Octagon Shape 20x15 mm Gems
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Blue
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Brown
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Golden
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Gray Octagon Shape 20x15 mm Gems
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Green
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Multicolor
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Orange
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Pink Octagon Shape 20x15 mm Gems
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Purple
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Red
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Turquoise
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Violet Octagon Shape 20x15 mm Gems
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White
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Yellow
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Single |
Pairs |
Lots |
Faceted |
Cabochons |
41.25ctw Gray Hematite, Emerald Cut, Opaque
20 x 15 mm (calibrated)
$ 40.22
20.89ct Violet Amethyst, Emerald Cut, VVS
20 x 15 mm (calibrated)
$ 145.65
23.96ct Violet Amethyst, Emerald Cut, VVS
20 x 15 mm (calibrated)
$ 167.05
17.51ct Violet Amethyst, Emerald Cut, VVS-VS
20 x 15 mm (calibrated)
$ 122.08
23.19ct Violet Amethyst, Emerald Cut, VVS
20 x 15 mm (calibrated)
$ 161.68
22.23ct Violet Amethyst, Emerald Cut, VVS
20 x 15 mm (calibrated)
$ 177.13
22.77ct Violet Amethyst, Emerald Cut, VVS
20 x 15 mm (calibrated)
$ 158.75
Why Buy Octagon Shape 20x15 Mm Gems from GemSelect?
- Trusted Worldwide Since 2003
- Supplying natural gemstones to jewelers and collectors in 120+ countries
- Verified natural gemstones
- View All GemSelect Reviews on Bizrate
- Secure checkout and insured worldwide delivery
- 30-day returns and satisfaction guarantee
GemSelect Certified Store Reviews
GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 10 
My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.
Overall Rating -> 10
Good, hope gem quality is good and genuine
Overall Rating -> 10
Easy and functional
Overall Rating -> 10
GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'
Overall Rating -> 10
I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.
Overall Rating -> 8 
Good prices
