90,000+Happy Customers
20+Years
WorldwideShipping
Cart
Free Report Included
Worldwide Shipping
30 Day Returns
Help Center Shipping Payment and Checkout Returns Certificates Contact Us
Home › Gemstones › Untreated Gemstones

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
2.53ctw Violet Amethyst, Oval, VVS-VS

2.53ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.86

View Gem
1.68ct Pink Tourmaline, Oval, VS-SI

1.68ct Pink Tourmaline, Oval, VS-SI

7.4 x 7.1 mm

$ 250.99

View Gem
4.20ct Violet Amethyst, Pear Shape, VS

4.20ct Violet Amethyst, Pear Shape, VS

15 x 10 mm (calibrated)

$ 32.21

View Gem
1.08ct Green Sphene, Oval, Transparent

1.08ct Green Sphene, Oval, Transparent

6.5 x 5.9 mm

$ 5.38

View Gem
0.92ct Pink Morganite, Pear Shape, VVS-VS

0.92ct Pink Morganite, Pear Shape, VVS-VS

8.6 x 5.1 mm

$ 80.63

View Gem
2.34ct Green Prehnite, Round, Transparent

2.34ct Green Prehnite, Round, Transparent

7.5 mm (calibrated)

$ 12.61

View Gem
2.31ct Green Sphene, Oval, Transparent

2.31ct Green Sphene, Oval, Transparent

7.8 x 7.1 mm

$ 12.66

View Gem
0.50ct Yellow Beryl, Oval, VS

0.50ct Yellow Beryl, Oval, VS

6.7 x 4.8 mm

$ 9.55

View Gem
3.89ct Violet Amethyst, Pear Shape, VVS

3.89ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 25.56

View Gem
2.34ctw Yellow Golden Beryl, Oval, VS

2.34ctw Yellow Golden Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 58.27

View Gem
28.66ct Brown Tiger'S Eye, Oval, Opaque

28.66ct Brown Tiger'S Eye, Oval, Opaque

25 x 18 mm (calibrated)

$ 28.54

View Gem
1.74ct Orange Hessonite Garnet, Round, VS-SI

1.74ct Orange Hessonite Garnet, Round, VS-SI

7 mm (calibrated)

$ 38.13

View Gem
4.31ctw Yellow Sillimanite, Oval, VVS-VS
Sillimanite Product Video (411818)

4.31ctw Yellow Sillimanite, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 165.28

View Gem
4.32ctw Pink Strawberry Quartz, Round, Transparent
Strawberry Quartz Product Video (609114)

4.32ctw Pink Strawberry Quartz, Round, Transparent

9 mm (calibrated)

$ 66.27

View Gem
2.77ct Yellow Citrine, Baguette, VVS-VS

2.77ct Yellow Citrine, Baguette, VVS-VS

11.9 x 6.1 mm

$ 21.25

View Gem
34.86ct White Quartz, Oval, Transparent

34.86ct White Quartz, Oval, Transparent

27.1 x 22.5 mm

$ 38.20

View Gem
0.87ct Yellow Beryl, Trillion, VVS

0.87ct Yellow Beryl, Trillion, VVS

7 x 7 mm (calibrated)

$ 17.33

View Gem
26.91ct Green Jadeite, Oval, Translucent

26.91ct Green Jadeite, Oval, Translucent

25.2 x 18.9 mm

$ 44.22

View Gem
1.06ct Purple Rhodolite Garnet, Oval, VS-SI

1.06ct Purple Rhodolite Garnet, Oval, VS-SI

7 x 5 mm (calibrated)

$ 39.59

View Gem
12.41ct Red Star Garnet, Oval, Opaque

12.41ct Red Star Garnet, Oval, Opaque

15.6 x 12.6 mm

$ 12.24

View Gem
3.07ct Yellow Citrine, Cushion, VVS-VS

3.07ct Yellow Citrine, Cushion, VVS-VS

12.6 x 8.2 mm

$ 23.55

View Gem
1.07ctw Multicolor Labradorite, Pear Shape, Translucent

1.07ctw Multicolor Labradorite, Pear Shape, Translucent

6 x 4 mm (calibrated)

$ 2.37

View Gem
7.23ct Green Prehnite, Fancy, Transparent

7.23ct Green Prehnite, Fancy, Transparent

17.3 x 11.6 mm

$ 10.06

View Gem
0.54ct Red Pyrope Garnet, Heart, VS

0.54ct Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 13.45

View Gem
1 2 3
...
548
Choose Page
1 - 1896

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

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 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

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

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