Loose 12 x 10 mm Onyx Gemstones for Sale - Calibrated for your jew...

Read All

Gemstone Information

Find More Content Here

Over 19 Years in the Gemstone Business!

Thank you for trusting us with your purchase!

Overall Rating -> 10

Great selection

Posted By GHS40 in December, 2023

Source: Bizrate

Overall Rating -> 10

Had a problem ordering first time. Someone from Gem Select reached out to me and cleared problem and I made purchase.

Posted By Myrtle in February, 2024

Source: Bizrate

Overall Rating -> 10

was just windowshopping and spotted a couple "Very Uncommons", a tsavorite & a demantoid garnet that were both in a size I was looking for, & that I could very easily pay for -- so figured I would grab the tsavo ASAP and got the demantoid to accompany so they wouldn't be lonely.

Posted By Kittypie070 in April, 2024

Source: Bizrate

Overall Rating -> 10

I really enjoy browsing through GemSelect. The selection is always marvelous and I love how detailed everything is described. The only thing I noticed is that when browsing through my phone, the videos of the gems do not load. If there were more videos of the gems, that would be amazing, though I understand that is a lot of work on GemSelect's part! Checking out is also very fast and easy, and I love that the return policy is very good, though I hope I don't have to use it anytime soon.

Posted By ChiChi in January, 2024

Source: Bizrate

Overall Rating -> 9

An it was good.

Posted By Miguel in June, 2023

Source: Bizrate

Overall Rating -> 9

making my own jewelry for my birth stone

Posted By LoveGeo in July, 2023

Source: Bizrate

Overall Rating -> 10

all good

Posted By John in December, 2023

Source: Bizrate

Overall Rating -> 10

I have used GemSelect for several years and plan to shop more in the further. This is a good source of information on gemstones. I love looking at and learning about them. Lot more than I ever knew existed.

Posted By Bikerwalrus in October, 2023

Source: Bizrate

Overall Rating -> 10

this was very easy im exited to get my order

Posted By Mr. in April, 2024

Source: Bizrate

Overall Rating -> 10

Everthing about researching and ordering from Gemselect was easy and uncomplicated. In the past I had payment problems, but your customer rep, Thomas, helped me get everything right. I will continue using Gemselet in the future for these reasons.

Posted By WildwillyfromArizona in August, 2023

Source: Bizrate

Overall Rating -> 10

Very easy. I have purchased a few times before and was satisfied each time. Thank you.

Posted By Ray in December, 2023

Source: Bizrate

Overall Rating -> 10

My overall interaction with your website was pleasant, as always.

Posted By RJ in April, 2024

Source: Bizrate

Overall Rating -> 10

Great website and information

Posted By Moonshot in December, 2023

Source: Bizrate

Overall Rating -> 9

Everything was good but since I am still new I was surprised at how small the stones where.

Posted By Js in May, 2023

Source: Bizrate

Overall Rating -> 10

I love GemSelect, photos and details are great.

Posted By #1 in February, 2024

Source: Bizrate

Gemstone SHOP

POLICIES

WHO ARE WE?

Gemstone EDUCATION

WE ARE LOCATED AT

183/24-25 Moo 4, Trirat Rd.
T. Chantanimit, A. Muang
Chanthaburi 22000
THAILAND
Phone: 1-800-464-1640
Phone: +66-39601289

STAY IN TOUCH | NEWSLETTER

*You're signing up to receive GemSelect promotional email.

Switch to Mobile Version

Reproduction (text or graphics) without the express written consent of GemSelect.com (SETT Company Ltd.) is strictly prohibited.

18523

Gemstones A-Z

Buy 12 x 10 mm Onyx Gems

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

4.2 ct Oval Onyx, 13.1 x 11.1 mm From Sri Lanka

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

11.43 carat Pear Onyx, loose Certified Onyx from Sri Lanka, Natural Gem, 19.1 x 14.5 mm

2.28 ct Round Onyx, 6.1 mm From Sri Lanka

2.48 ct Round Onyx, 6.3 mm From Sri Lanka

1.03 ct Round Onyx, 6.3 mm From Sri Lanka

1.15 ct Oval Onyx, 7 x 5 mm From Sri Lanka

1.02 ct Oval Onyx, 7.8 x 5.9 mm From Sri Lanka

27.22 ct Oval Rose Cut Onyx, 25.6 x 18.7 mm From Sri Lanka

2.96 ct Round Onyx, 7.2 mm From Sri Lanka

4.22 ct Oval Onyx, 13 x 11.1 mm From Sri Lanka

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

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

2.9 ct Round Onyx, 7 mm From Sri Lanka

2.24 ct Round Onyx, 5.6 mm From Sri Lanka

24.74 ct Oval Rose Cut Onyx, 25.7 x 19.6 mm From Sri Lanka

23.37 ct Oval Onyx, 22.1 x 16 mm From Sri Lanka

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

11.4 ct Oval Onyx, 18.2 x 13.3 mm From Sri Lanka

1.7 ct Round Onyx, 5.6 mm From Sri Lanka

3.03 ct Round Onyx, 7.1 mm From Sri Lanka

3.17 ct Round Onyx, 7.3 mm From Sri Lanka

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

8.62 ct Cushion Onyx, 12 x 7.9 mm From Sri Lanka

1.58 ct Round Onyx, 7.2 mm From Sri Lanka

4.54 ct Cushion Onyx, 10.9 x 10.9 mm From Sri Lanka

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

19.31 ct Oval Onyx, 25.2 x 18.2 mm From Sri Lanka

15.16 carat Pear Shape Onyx, loose Certified Onyx from Sri Lanka, Natural Gem, 26.9 x 14.8 mm

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

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

Gemstone Information

Gemstone SHOP

POLICIES

WHO ARE WE?

Gemstone EDUCATION

WE ARE LOCATED AT