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
33.38ct Yellow Obsidian, Oval, Opaque

33.38ct Yellow Obsidian, Oval, Opaque

34.6 x 23.5 mm

$ 26.59

View Gem
0.19ct Black Diamond, Round, Opaque

0.19ct Black Diamond, Round, Opaque

3.5 mm (calibrated)

$ 90.39

View Gem
1.47ctw Red Pyrope Garnet, Square, VS

1.47ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.27

View Gem
1.18ct Yellow Citrine, Round, VVS

1.18ct Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 7.84

View Gem
1.16ct White Sillimanite Cat'S Eye, Oval, Transparent

1.16ct White Sillimanite Cat'S Eye, Oval, Transparent

7.4 x 5.1 mm

$ 3.82

View Gem
20.88ct Orange Moonstone, Oval, Opaque

20.88ct Orange Moonstone, Oval, Opaque

22.5 x 16.1 mm

$ 28.59

View Gem
6.92ct Blue Larimar, Round, Opaque

6.92ct Blue Larimar, Round, Opaque

12 mm (calibrated)

$ 79.05

View Gem
12.99ct Green Prehnite, Flower Cut, Translucent

12.99ct Green Prehnite, Flower Cut, Translucent

16 x 12 mm (calibrated)

$ 29.89

View Gem
3.83ct Yellow Citrine, Pear Shape, VVS-VS

3.83ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 24.05

View Gem
2.68ctw White Rainbow Moonstone, Square, Transparent/Translucent

2.68ctw White Rainbow Moonstone, Square, Transparent/Translucent

3 x 2.9 mm

$ 48.94

View Gem
24.00ct Multicolor Tiger'S Eye Matrix, Cushion, Opaque

24.00ct Multicolor Tiger'S Eye Matrix, Cushion, Opaque

19.3 x 15.6 mm

$ 23.90

View Gem
7.17ct Multicolor Agate, Oval, Opaque

7.17ct Multicolor Agate, Oval, Opaque

13.2 x 11.8 mm

$ 6.78

View Gem
48.71ct Violet Amethyst, Oval, IF
Amethyst Product Video (751300)

48.71ct Violet Amethyst, Oval, IF

25.4 x 19.1 mm

$ 323.43

View Gem
1.80ct Green Sphene, Oval, Transparent

1.80ct Green Sphene, Oval, Transparent

6.9 x 6.7 mm

$ 8.96

View Gem
6.14ct Yellow Cat'S Eye Opal, Oval, Translucent

6.14ct Yellow Cat'S Eye Opal, Oval, Translucent

15 x 10 mm (calibrated)

$ 20.18

View Gem
1.79ct Green Sphene, Oval, Transparent

1.79ct Green Sphene, Oval, Transparent

7.8 x 6.5 mm

$ 8.91

View Gem
2.21ctw Multicolor Andalusite, Oval, VS

2.21ctw Multicolor Andalusite, Oval, VS

5 x 3 mm (calibrated)

$ 118.07

View Gem
11.10ct Turquoise Grandidierite, Oval, Translucent

11.10ct Turquoise Grandidierite, Oval, Translucent

14.8 x 13.3 mm

$ 364.83

View Gem
1.19ct Orange Hessonite Garnet, Oval, VS

1.19ct Orange Hessonite Garnet, Oval, VS

7.2 x 5.8 mm

$ 22.52

View Gem
6.28ct Multicolor Cinnabar, Oval, Opaque

6.28ct Multicolor Cinnabar, Oval, Opaque

17.5 x 11.6 mm

$ 7.35

View Gem
2.26ct Green Peridot, Cushion, VS

2.26ct Green Peridot, Cushion, VS

8.1 x 7.2 mm

$ 88.98

View Gem
1.80ct Yellow Citrine, Pear Shape, VVS-VS

1.80ct Yellow Citrine, Pear Shape, VVS-VS

8.3 x 8.8 mm

$ 13.80

View Gem
4.19ctw Multicolor Spectrolite, Oval, Opaque

4.19ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 19.16

View Gem
1.81ct Black Star Diopside, Oval, Opaque

1.81ct Black Star Diopside, Oval, Opaque

8 x 6 mm (calibrated)

$ 9.01

View Gem
1 2 3
...
1423
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 love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
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
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image