90,000+Happy Customers
20+Years
WorldwideShipping
Cart
Free Report Included
Worldwide Shipping
30 Day Returns
Help Center Shipping Payment and Checkout Returns Certificates Contact Us
Home Gemstones Gemstones By Weight 15 ct Gemstones

Buy Big 15 Carat Natural Gemstones

15 ct Gemstones Weight
15 ct Gemstones Size
15 ct Gemstones Clarity
15 ct Gemstones Price
15 ct Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color 15 ct Gemstones
Black 15 ct Gemstones
Blue 15 ct Gemstones
Brown 15 ct Gemstones
Golden
Gray 15 ct Gemstones
Green 15 ct Gemstones
Multicolor 15 ct Gemstones
Orange 15 ct Gemstones
Pink 15 ct Gemstones
Purple 15 ct Gemstones
Red 15 ct Gemstones
Turquoise 15 ct Gemstones
Violet 15 ct Gemstones
White 15 ct Gemstones
Yellow 15 ct Gemstones
Single
Pairs
Lots
Faceted
Cabochons
Clear All

15.62ct Red Star Garnet, Oval, Opaque

16.9 x 11.7 mm

$ 16.18

View Gem

15.71ct Green Bloodstone, Oval, Opaque

20.3 x 13.3 mm

$ 23.47

View Gem

15.45ct Purple Ruby-Zoisite, Flower Cut, Opaque

14 x 14 mm (calibrated)

$ 18.77

View Gem

15.45ct Multicolor Agate, Fancy, Opaque

13 x 13 mm (calibrated)

$ 14.62

View Gem

15.79ct Multicolor Agate, Oval, Opaque

16.7 x 14.1 mm

$ 12.58

View Gem

15.74ct White Howlite, Pear Shape, Opaque

22.2 x 17.3 mm

$ 7.53

View Gem

15.51ct Purple Ruby-Zoisite, Flower Cut, Opaque

16.9 x 15 mm

$ 18.84

View Gem

15.21ct Yellow Quartz, Oval, VS

20 x 15 mm (calibrated)

$ 33.32

View Gem

15.37ct Multicolor Ammolite, Fancy, Opaque

19.9 x 19 mm

$ 306.17

View Gem

15.85ct Violet Amethyst, Cushion, VVS

20 x 15 mm (calibrated)

$ 110.51

View Gem

15.78ct Pink Rose Quartz, Oval, Transparent

17.9 x 14.2 mm

$ 25.94

View Gem

15.50ct Green Cat'S Eye Aquamarine, Oval, Transparent

16.1 x 14.3 mm

$ 272.39

View Gem

Why Buy 15 Ct Gemstones from GemSelect?

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate
Enlarged Gemstone Image