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
3.90ctw Brown Smoky Quartz, Round, VVS-VS

3.90ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 6.42

View Gem
11.27ct Blue Color-Change Fluorite, Round, VS
Color-Change Fluorite Product Video (445130)

11.27ct Blue Color-Change Fluorite, Round, VS

14 mm (calibrated)

$ 309.67

View Gem
0.53ct Green Tourmaline, Emerald Cut, VS

0.53ct Green Tourmaline, Emerald Cut, VS

5.3 x 4.1 mm

$ 26.39

View Gem
5.05ct Pink Strawberry Quartz, Oval, Translucent

5.05ct Pink Strawberry Quartz, Oval, Translucent

13.5 x 9.8 mm

$ 30.32

View Gem
7.85ctw Violet Amethyst, Oval, Transparent

7.85ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 43.01

View Gem
1.09ct Red Rhodolite Garnet, Emerald Cut, VS

1.09ct Red Rhodolite Garnet, Emerald Cut, VS

6.2 x 4.9 mm

$ 40.71

View Gem
18.51ct Multicolor Peanut Wood, Pear Shape, Opaque

18.51ct Multicolor Peanut Wood, Pear Shape, Opaque

28.8 x 19.1 mm

$ 11.06

View Gem
36.03ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

36.03ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

32.7 x 23.1 mm

$ 35.89

View Gem
2.19ct Orange Hessonite Garnet, Cushion, VS-SI

2.19ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 35.49

View Gem
0.26ct Pink Morganite, Round, VVS-VS

0.26ct Pink Morganite, Round, VVS-VS

4.5 mm (calibrated)

$ 11.65

View Gem
5.31ct Pink Rose Quartz, Emerald Cut, Transparent

5.31ct Pink Rose Quartz, Emerald Cut, Transparent

10.6 x 10.6 mm

$ 22.04

View Gem
5.89ctw Brown Smoky Quartz, Oval, Transparent

5.89ctw Brown Smoky Quartz, Oval, Transparent

7.2 x 5.9 mm

$ 5.69

View Gem
5.30ctw Violet Amethyst, Fancy, VS

5.30ctw Violet Amethyst, Fancy, VS

9 x 4.6 mm

$ 29.03

View Gem
20.96ct Green Aventurine, Oval, Translucent

20.96ct Green Aventurine, Oval, Translucent

26.1 x 15 mm

$ 20.87

View Gem
2.23ctw Pink Tourmaline, Round, Transparent

2.23ctw Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 40.72

View Gem
1.20ct Purple Spinel, Cushion, VS

1.20ct Purple Spinel, Cushion, VS

6.3 x 5.7 mm

$ 84.42

View Gem
14.12ctw Black Spinel, Oval, Opaque

14.12ctw Black Spinel, Oval, Opaque

14 x 10 mm (calibrated)

$ 38.68

View Gem
5.85ct Pink Strawberry Quartz, Oval, Translucent

5.85ct Pink Strawberry Quartz, Oval, Translucent

14 x 10 mm (calibrated)

$ 35.26

View Gem
0.63ct Orange Citrine, Oval, VVS-VS

0.63ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 6.27

View Gem
0.84ct Yellow Morganite, Cushion, VS

0.84ct Yellow Morganite, Cushion, VS

6 x 6 mm (calibrated)

$ 50.61

View Gem
6.16ct Brown Tiger'S Eye, Oval, Opaque

6.16ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 6.13

View Gem
1.72ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

1.72ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

7.5 x 5 mm

$ 51.39

View Gem
0.53ct Pink Spinel, Cushion, VS

0.53ct Pink Spinel, Cushion, VS

4.4 x 4.3 mm

$ 22.00

View Gem
1.92ct Orange Hessonite Garnet, Emerald Cut, VS

1.92ct Orange Hessonite Garnet, Emerald Cut, VS

9 x 6 mm (calibrated)

$ 29.79

View Gem
1 2 3
...
354
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 -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image