X
Gemstone Search
90,000+ Happy Customers
20+ Years In Business
Call Us Mon–Fri 8am–5pm

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

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
74.29ctw Multicolor Rhodochrosite, Sphere / Ball, Opaque
Rhodochrosite Product Video (447530)

74.29ctw Multicolor Rhodochrosite, Sphere / Ball, Opaque

15.6 mm

$ 162.79

View Gem
2.80ct Yellow Prehnite, Oval, Transparent/Translucent

2.80ct Yellow Prehnite, Oval, Transparent/Translucent

10.1 x 7.3 mm

$ 26.26

View Gem
2.10ctw Yellow Color-Change Diaspore, Cushion, VVS

2.10ctw Yellow Color-Change Diaspore, Cushion, VVS

10.8 x 3.8 mm

$ 108.13

View Gem
28.58ct Violet Charoite, Oval, Opaque

28.58ct Violet Charoite, Oval, Opaque

28.4 x 17.7 mm

$ 46.97

View Gem
11.78ct Green Prehnite, Fancy, Transparent

11.78ct Green Prehnite, Fancy, Transparent

19 x 13.3 mm

$ 16.39

View Gem
35.20ct Multicolor Labradorite, Oval, Opaque

35.20ct Multicolor Labradorite, Oval, Opaque

33.8 x 18.9 mm

$ 31.56

View Gem
0.77ct Pink Tourmaline, Oval, Transparent

0.77ct Pink Tourmaline, Oval, Transparent

6.3 x 4.8 mm

$ 12.76

View Gem
21.46ct Violet Amethyst, Cushion, VVS

21.46ct Violet Amethyst, Cushion, VVS

18 x 18 mm (calibrated)

$ 149.62

View Gem
0.15ctw White Diamond, Round, VVS-VS

0.15ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 268.16

View Gem
4.21ct Multicolor Agate, Round, Translucent

4.21ct Multicolor Agate, Round, Translucent

10 mm (calibrated)

$ 8.38

View Gem
3.20ctw Yellow Citrine, Emerald Cut, VVS

3.20ctw Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 25.50

View Gem
2.06ct Orange Hessonite Garnet, Round, VS

2.06ct Orange Hessonite Garnet, Round, VS

7.5 mm (calibrated)

$ 45.14

View Gem
1.19ct Green Tourmaline, Oval, VS

1.19ct Green Tourmaline, Oval, VS

7.1 x 5.7 mm

$ 56.89

View Gem
0.73ct Green Peridot, Marquise, VVS-VS

0.73ct Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 11.64

View Gem
2.01ct Green Tourmaline, Emerald Cut, VVS-VS

2.01ct Green Tourmaline, Emerald Cut, VVS-VS

19 x 3.5 mm

$ 55.06

View Gem
12.62ct Brown Tiger'S Eye, Fancy, Opaque

12.62ct Brown Tiger'S Eye, Fancy, Opaque

16 x 15.1 mm

$ 13.83

View Gem
2.05ctw Orange Sunstone, Oval, Translucent

2.05ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 14.29

View Gem
6.64ct Blue Larimar, Pear Shape, Opaque

6.64ct Blue Larimar, Pear Shape, Opaque

19.3 x 10.8 mm

$ 79.36

View Gem
0.61ct Orange Sphalerite, Round, VS-SI

0.61ct Orange Sphalerite, Round, VS-SI

5 mm (calibrated)

$ 30.38

View Gem
9.38ct Black Nuummite, Oval, Opaque

9.38ct Black Nuummite, Oval, Opaque

17.3 x 12.3 mm

$ 41.38

View Gem
2.19ct Pink Tourmaline, Emerald Cut, VVS-VS

2.19ct Pink Tourmaline, Emerald Cut, VVS-VS

8.7 x 5.4 mm

$ 107.97

View Gem
0.57ct Orange Sphalerite, Round, SI

0.57ct Orange Sphalerite, Round, SI

4.7 mm

$ 28.39

View Gem
1.10ctw Green Peridot, Marquise, VVS

1.10ctw Green Peridot, Marquise, VVS

8 x 4 mm (calibrated)

$ 16.43

View Gem
0.56ct Green Peridot, Marquise, VS

0.56ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.37

View Gem
1 2 3
...
1502
Choose Page
1 - 1895

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 -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 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 -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image