Loose Onyx Gemstones for Sale - Items in Stock and ready to Ship |...

Onyx is the black form of chalcedony, a cryptocrystalline form of quartz. Onyx naturally occurs in bands of black and white, and is typically dyed to produce the familiar jet black cabochons.

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Gemstone Information

Over 19 Years in the Gemstone Business!

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Overall Rating -> 10

Excellent experience!

Posted By Steph in April, 2023

Source: Bizrate

Overall Rating -> 8

purchased birthstones to be mounted into stud earrings as a gift for a friend's gift

Posted By MI photo in May, 2023

Source: Bizrate

Overall Rating -> 10

The website is easy to navigate and has a great selection. I am an amateur silver smith casting jewelry with stones

Posted By Jrplunk in April, 2024

Source: Bizrate

Overall Rating -> 10

I was looking for a source for affordable genuine gemstones for my grandson who is currently very interested in rocks and gems. I was quite surprised and pleased to find GemSelect and finding the right stones at the right price couldn't have been simpler.

Posted By Papa in December, 2023

Source: Bizrate

Overall Rating -> 10

I found it to be easy to browse and easy to use

Posted By Kyle in December, 2023

Source: Bizrate

Overall Rating -> 10

It was easy to find the color gem I desired and checkout was simple as well. Very excited to receive my gemstone.

Posted By Nikki J in September, 2023

Source: Bizrate

Overall Rating -> 10

I bought a small ring green so I may practice my jewelry making.

Posted By HairyOtter in July, 2023

Source: Bizrate

Overall Rating -> 9

So many gorgeous stones! The only "complaint" I have is it's difficult to visualize sizes in mm. Perhaps some way to compare in inches?It has been a long time since I bought stones from Gem select, but the process wasn't too difficult.

Posted By Ktreva52 in February, 2024

Source: Bizrate

Overall Rating -> 10

I have actually done business with them before and was quite satisfied with them then.My Mother collected turtle items and when I saw the Mother of Pearl turtle...I just thought of her and decided to buy it. It's even tinier than I thought, but so adorable!The gemstones I bought are for jewelry for my daughter's birthday.

Posted By Ktreva52 in February, 2024

Source: Bizrate

Overall Rating -> 10

Everything fine.

Posted By Hilario in December, 2023

Source: Bizrate

Overall Rating -> 10

Easy and fast

Posted By Mark in February, 2024

Source: Bizrate

Overall Rating -> 10

Easy to use.

Posted By Hope in March, 2024

Source: Bizrate

Overall Rating -> 10

Great experience! First time buyer

Posted By Todi89 in February, 2024

Source: Bizrate

Overall Rating -> 8

Very easy to find the specific stone I was looking for. I am pleased by both the selection and the price of the stones that are available. The only "bad" thing that I have to say is that the interface of the site is outdated.

Posted By Nick in March, 2024

Source: Bizrate

Overall Rating -> 10

No issues at all. It was great.

Posted By LJXK in May, 2023

Source: Bizrate

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Phone: +66-39601289

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Gemstones A-Z

Buy Onyx Gemstones

2.65 ct Round Onyx, 6.8 mm From Sri Lanka

1.37 ct Round Onyx, 7 mm From Sri Lanka

1.48 ct Round Onyx, 6.8 mm From Sri Lanka

1.98 ct Round Onyx, 5.5 mm From Sri Lanka

3.11 ct Round Onyx, 7.2 mm From Sri Lanka

2.05 ct Round Onyx, 5.5 mm From Sri Lanka

0.85 ct Round Onyx, 5.5 mm From Sri Lanka

8.44 ct Heart Rose Cut Onyx, 10.4 x 10.3 mm From Sri Lanka

4.46 ct Heart Rose Cut Onyx, 10.5 x 10.4 mm From Sri Lanka

3.17 ct Round Onyx, 7.3 mm From Sri Lanka

19.82 ct Oval Onyx, 25.1 x 18.1 mm From Sri Lanka

8.67 ct Heart Onyx, 10.2 x 10.1 mm From Sri Lanka

1.12 ct Round Onyx, 6.3 mm From Sri Lanka

4.71 ct Cushion Onyx, 11 x 11 mm From Sri Lanka

3.11 ct Round Onyx, 7 mm From Sri Lanka

1.44 ct Round Onyx, 5.9 mm From Sri Lanka

4.06 ct Oval Onyx, 13.1 x 11 mm From Sri Lanka

4.31 ct Heart Rose Cut Onyx, 10.4 x 10.3 mm From Sri Lanka

2.41 ct Round Onyx, 6.4 mm From Sri Lanka

4.83 ct Cushion Onyx, 11 x 10.9 mm From Sri Lanka

6.79 ct Trillion Onyx, 9.9 x 9.4 mm From Sri Lanka

1.63 ct Round Onyx, 6.9 mm From Sri Lanka

4.51 ct Cushion Onyx, 11 x 10.9 mm From Sri Lanka

4.1 ct Heart Onyx, 10.1 x 10.1 mm From Sri Lanka

4.89 ct Cushion Onyx, 11 x 10.9 mm From Sri Lanka

32.3 ct Round Rose Cut Onyx, 25.6 mm From Sri Lanka

4.77 ct Cushion Onyx, 11 x 10.9 mm From Sri Lanka

3.36 ct Round Onyx, 7.3 mm From Sri Lanka

2.94 ct Round Onyx, 7.1 mm From Sri Lanka

8.71 ct Heart Rose Cut Onyx, 10.5 x 10.4 mm From Sri Lanka

2.12 ct Round Onyx, 5.6 mm From Sri Lanka

9.56 ct Cushion Onyx, 11 x 10.9 mm From Sri Lanka

Gemstone Information

Gemstone SHOP

POLICIES

WHO ARE WE?

Gemstone EDUCATION

WE ARE LOCATED AT