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
1.97ct Turquoise Fluorite, Pear Shape, Transparent

1.97ct Turquoise Fluorite, Pear Shape, Transparent

9 x 7 mm (calibrated)

$ 7.85

View Gem
0.99ct Pink Morganite, Round, VS-SI

0.99ct Pink Morganite, Round, VS-SI

7 mm (calibrated)

$ 38.45

View Gem
2.22ct Yellow Beryl, Oval, VVS-VS

2.22ct Yellow Beryl, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 44.22

View Gem
0.95ct Green Tourmaline, Emerald Cut, VVS

0.95ct Green Tourmaline, Emerald Cut, VVS

8.8 x 3.7 mm

$ 23.66

View Gem
0.89ct Green Peridot, Emerald Cut, VS

0.89ct Green Peridot, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 13.30

View Gem
1.47ctw Yellow Citrine, Heart, VVS-VS

1.47ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 11.71

View Gem
0.17ctw White Diamond, Round, VVS-VS

0.17ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 308.86

View Gem
1.84ct Pink Tourmaline, Emerald Cut, VVS-VS
Tourmaline Product Video (528680)

1.84ct Pink Tourmaline, Emerald Cut, VVS-VS

8.7 x 5.2 mm

$ 133.05

View Gem
13.12ct Brown Tiger'S Eye Matrix, Pear Shape, Opaque

13.12ct Brown Tiger'S Eye Matrix, Pear Shape, Opaque

18.9 x 14.3 mm

$ 13.06

View Gem
4.66ct Yellow Citrine, Emerald Cut, VVS-VS

4.66ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 32.49

View Gem
0.83ct Green Tourmaline, Baguette, VS

0.83ct Green Tourmaline, Baguette, VS

16.2 x 2.8 mm

$ 28.93

View Gem
1.87ct Violet Amethyst, Heart, VVS

1.87ct Violet Amethyst, Heart, VVS

8 x 8 mm (calibrated)

$ 13.04

View Gem
27.65ct Green Fluorite, Oval, Transparent

27.65ct Green Fluorite, Oval, Transparent

26.1 x 14.4 mm

$ 47.56

View Gem
3.13ctw Orange Citrine, Round, VVS-VS

3.13ctw Orange Citrine, Round, VVS-VS

8 mm (calibrated)

$ 25.98

View Gem
2.84ctw Red Pyrope Garnet, Square, VS

2.84ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 21.78

View Gem
4.33ct Violet Amethyst, Fancy, VVS-VS

4.33ct Violet Amethyst, Fancy, VVS-VS

11.5 x 10.7 mm

$ 24.84

View Gem
2.47ct Multicolor Labradorite, Baguette, Translucent

2.47ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 3.39

View Gem
1.98ctw Blue Kyanite, Oval, SI

1.98ctw Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 41.22

View Gem
2.70ct Yellow Citrine, Baguette, VS

2.70ct Yellow Citrine, Baguette, VS

12.2 x 6.1 mm

$ 20.71

View Gem
27.24ct White Rainbow Moonstone, Oval, Transparent
Rainbow Moonstone Product Video (673566)

27.24ct White Rainbow Moonstone, Oval, Transparent

23.7 x 17.7 mm

$ 406.97

View Gem
35.49ct Black Obsidian, Pear Shape, Opaque

35.49ct Black Obsidian, Pear Shape, Opaque

33.4 x 22.5 mm

$ 38.89

View Gem
4.58ctw White Topaz, Square, VVS-VS

4.58ctw White Topaz, Square, VVS-VS

4.2 x 4.2 mm

$ 33.52

View Gem
7.85ct Multicolor Agate, Round, Opaque

7.85ct Multicolor Agate, Round, Opaque

11 mm (calibrated)

$ 6.26

View Gem
4.84ct Yellow Apatite, Emerald Cut, VVS-VS

4.84ct Yellow Apatite, Emerald Cut, VVS-VS

12.6 x 9.5 mm

$ 132.36

View Gem
1 2 3
...
409
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

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image