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
4.94ctw Violet Amethyst, Oval, Transparent

4.94ctw Violet Amethyst, Oval, Transparent

10 x 8 mm (calibrated)

$ 27.06

View Gem
3.08ct Pink Rose Quartz, Emerald Cut, Transparent

3.08ct Pink Rose Quartz, Emerald Cut, Transparent

9 x 9 mm (calibrated)

$ 16.87

View Gem
0.58ct Pink Spinel, Cushion, VVS

0.58ct Pink Spinel, Cushion, VVS

5 x 4.3 mm

$ 40.44

View Gem
2.60ctw Red Rhodolite Garnet, Square, VS

2.60ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 22.76

View Gem
1.57ct Orange Hessonite Garnet, Oval, VVS-VS

1.57ct Orange Hessonite Garnet, Oval, VVS-VS

7.6 x 6.3 mm

$ 31.27

View Gem
0.49ct Green Chrome Diopside, Oval, VS

0.49ct Green Chrome Diopside, Oval, VS

6 x 4 mm (calibrated)

$ 12.20

View Gem
9.95ct Multicolor Coral, Oval, Translucent

9.95ct Multicolor Coral, Oval, Translucent

20.8 x 16.2 mm

$ 21.80

View Gem
49.70ct Multicolor Jasper, Baguette, Opaque

49.70ct Multicolor Jasper, Baguette, Opaque

32.6 x 24.9 mm

$ 29.95

View Gem
7.39ctw Yellow Citrine, Pear Shape, VVS-VS

7.39ctw Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 48.57

View Gem
3.29ctw White Topaz, Cushion, VVS-VS

3.29ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 18.03

View Gem
2.37ct Green Tourmaline, Emerald Cut, SI

2.37ct Green Tourmaline, Emerald Cut, SI

15.7 x 4.6 mm

$ 64.92

View Gem
5.24ct Brown Smoky Quartz, Emerald Cut, VVS-VS

5.24ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 10 mm

$ 22.97

View Gem
7.80ctw Yellow Citrine, Oval, VVS-VS

7.80ctw Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 62.15

View Gem
16.38ct Blue Larimar, Cushion, Opaque
Larimar Product Video (433877)

16.38ct Blue Larimar, Cushion, Opaque

23.9 x 22.6 mm

$ 197.41

View Gem
1.11ct Green Tourmaline, Round, Transparent

1.11ct Green Tourmaline, Round, Transparent

6 mm (calibrated)

$ 22.11

View Gem
5.60ct White Topaz, Oval, VVS

5.60ct White Topaz, Oval, VVS

12 x 10 mm (calibrated)

$ 37.18

View Gem
9.77ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

9.77ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

19.9 x 9.8 mm

$ 72.04

View Gem
4.43ctw Brown Tiger'S Eye, Oval, Opaque

4.43ctw Brown Tiger'S Eye, Oval, Opaque

9 x 7.5 mm

$ 4.42

View Gem
26.38ct Blue Turquoise, Oval, Opaque
Turquoise Product Video (724929)

26.38ct Blue Turquoise, Oval, Opaque

25.2 x 14.8 mm

$ 78.83

View Gem
9.58ctw Green Malachite, Baguette, Opaque

9.58ctw Green Malachite, Baguette, Opaque

10 x 8 mm (calibrated)

$ 11.37

View Gem
66.42ct Multicolor Coral, Oval, Opaque

66.42ct Multicolor Coral, Oval, Opaque

54.5 x 30.2 mm

$ 72.77

View Gem
18.06ct Gray Hematite, Marquise, Opaque

18.06ct Gray Hematite, Marquise, Opaque

26.4 x 12.1 mm

$ 17.61

View Gem
7.22ctw Multicolor Labradorite, Marquise, Translucent

7.22ctw Multicolor Labradorite, Marquise, Translucent

14 x 7 mm (calibrated)

$ 15.97

View Gem
2.21ct Brown Smoky Quartz, Oval, VVS

2.21ct Brown Smoky Quartz, Oval, VVS

9.5 x 7.7 mm

$ 15.40

View Gem
1 2 3
...
891
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 have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate

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 -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

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