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
4.09ct Yellow Citrine, Oval, VVS

4.09ct Yellow Citrine, Oval, VVS

13 x 9 mm (calibrated)

$ 24.78

View Gem
30.48ctw Multicolor Fossil Coral, Oval, Opaque

30.48ctw Multicolor Fossil Coral, Oval, Opaque

20.5 x 12.5 mm

$ 54.43

View Gem
2.72ct Multicolor Labradorite, Baguette, Translucent

2.72ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 3.74

View Gem
3.92ct Violet Amethyst, Briolette, VS

3.92ct Violet Amethyst, Briolette, VS

12.2 x 7 mm

$ 17.18

View Gem
0.51ct Yellow Grossularite Garnet, Round, VS

0.51ct Yellow Grossularite Garnet, Round, VS

5 mm (calibrated)

$ 12.85

View Gem
1.86ct Green Prehnite, Oval, Transparent/Translucent

1.86ct Green Prehnite, Oval, Transparent/Translucent

7.3 x 6.9 mm

$ 8.49

View Gem
0.70ct Green Tourmaline, Oval, Transparent

0.70ct Green Tourmaline, Oval, Transparent

6.1 x 4.9 mm

$ 12.00

View Gem
13.09ct Green Maw-Sit-Sit, Oval, Opaque

13.09ct Green Maw-Sit-Sit, Oval, Opaque

15.9 x 13.3 mm

$ 43.03

View Gem
0.55ct Green Peridot, Marquise, VS

0.55ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.22

View Gem
0.83ct Blue Kyanite, Round, SI

0.83ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 22.97

View Gem
1.48ct Orange Hessonite Garnet, Oval, VS

1.48ct Orange Hessonite Garnet, Oval, VS

7.7 x 6.4 mm

$ 29.48

View Gem
2.30ct Violet Amethyst, Trillion, VS

2.30ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 16.04

View Gem
13.03ct Violet Amethyst, Cushion, VVS

13.03ct Violet Amethyst, Cushion, VVS

15 x 15 mm (calibrated)

$ 90.84

View Gem
0.80ct Pink Morganite, Pear Shape, VVS-VS

0.80ct Pink Morganite, Pear Shape, VVS-VS

9.9 x 5 mm

$ 48.21

View Gem
1.30ct Pink Morganite, Pear Shape, VVS-VS

1.30ct Pink Morganite, Pear Shape, VVS-VS

10.7 x 5.7 mm

$ 99.70

View Gem
25.55ct Purple Ruby-Zoisite, Flower Cut, Opaque

25.55ct Purple Ruby-Zoisite, Flower Cut, Opaque

19.5 x 18.8 mm

$ 31.04

View Gem
0.75ct Yellow Color-Change Diaspore, Cushion, VS

0.75ct Yellow Color-Change Diaspore, Cushion, VS

5.9 x 5 mm

$ 26.29

View Gem
41.21ct Violet Amethyst, Pear Shape, VVS
Amethyst Product Video (506000)

41.21ct Violet Amethyst, Pear Shape, VVS

25.3 x 20 mm

$ 270.90

View Gem
0.39ct Multicolor Opal, Pear Shape, Transparent

0.39ct Multicolor Opal, Pear Shape, Transparent

7 x 5 mm (calibrated)

$ 9.71

View Gem
1.09ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

1.09ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

10.8 x 5 mm

$ 38.21

View Gem
0.73ct Yellow Beryl, Oval, VS

0.73ct Yellow Beryl, Oval, VS

7 x 5 mm (calibrated)

$ 13.94

View Gem
0.28ct White Diamond, Round, VVS
Diamond Product Video (747220)

0.28ct White Diamond, Round, VVS

4 mm (calibrated)

$ 470.10

View Gem
3.13ct Red Almandine Garnet, Pear Shape, VVS-VS

3.13ct Red Almandine Garnet, Pear Shape, VVS-VS

12 x 8 mm (calibrated)

$ 25.98

View Gem
42.51ct Multicolor Jasper, Oval, Opaque

42.51ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 46.57

View Gem
1 2 3
...
1679
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

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
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

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

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