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 Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

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

8.99ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 6.32

View Gem

5.19ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 3.05

View Gem

1.82ct Red Pyrope Garnet, Square, VVS-VS

7 x 7 mm (calibrated)

$ 13.95

View Gem

2.81ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 24.60

View Gem

6.22ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 3.65

View Gem

1.95ct Orange Sunstone, Round, Translucent

8.5 mm (calibrated)

$ 11.67

View Gem

0.89ct White Sillimanite Cat'S Eye, Oval, Transparent

6.4 x 4.1 mm

$ 3.54

View Gem

2.21ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 4.40

View Gem

1.68ctw Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 46.02

View Gem

9.99ct Green Tsavorite Garnet, Pear Shape, Translucent

17.9 x 13.6 mm

$ 218.90

View Gem

18.62ct Multicolor Opal, Oval, Opaque

26.2 x 16.6 mm

$ 463.64

View Gem

13.49ct White Rainbow Moonstone, Pear Shape, Transparent

20 x 15 mm (calibrated)

$ 201.54

View Gem

20.90ctw Black Spinel, Oval, Opaque

16 x 12 mm (calibrated)

$ 68.69

View Gem

11.03ct Green Prehnite, Fancy, Translucent

16 x 12 mm (calibrated)

$ 18.12

View Gem

5.39ct Violet Amethyst, Oval, Transparent

13.5 x 10.8 mm

$ 26.84

View Gem

5.51ctw Multicolor Pietersite, Pear Shape, Opaque

17.2 x 7.4 mm

$ 13.50

View Gem

4.35ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 28.59

View Gem

22.98ct Multicolor Jasper, Fancy, Opaque

38.4 x 14.4 mm

$ 16.87

View Gem

19.85ct Multicolor Ruby-Zoisite, Baguette, Opaque

22.3 x 12.2 mm

$ 35.46

View Gem

12.46ct Multicolor Pietersite, Baguette, Opaque

26.2 x 10.9 mm

$ 37.23

View Gem

9.32ctw Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 55.96

View Gem

1.31ctw Green Peridot, Marquise, VVS-VS

7.6 x 4 mm

$ 11.49

View Gem

0.04ct White Diamond, Round, VVS

2.2 mm (calibrated)

$ 92.69

View Gem

1.91ct Yellow Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 12.56

View Gem
1 2 3
...
551
Choose Page
1 - 1896

Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

GemSelect Certified Store Reviews

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

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate
Enlarged Gemstone Image