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
1.66ct Orange Zircon, Oval, VVS-VS

1.66ct Orange Zircon, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 27.28

View Gem
22.00ct Multicolor Quartz With Marcasite, Oval, Transparent

22.00ct Multicolor Quartz With Marcasite, Oval, Transparent

23.3 x 14.9 mm

$ 144.62

View Gem
1.65ct Green Tourmaline, Emerald Cut, VS

1.65ct Green Tourmaline, Emerald Cut, VS

20.5 x 3.2 mm

$ 43.38

View Gem
6.64ct Violet Chalcedony, Cushion, Translucent

6.64ct Violet Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 24.80

View Gem
0.85ct Green Peridot, Oval, VS

0.85ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 11.85

View Gem
17.87ct Multicolor Rainbow Pyrite, Heart, Opaque

17.87ct Multicolor Rainbow Pyrite, Heart, Opaque

22.4 x 22.4 mm

$ 46.10

View Gem
1.93ct Yellow Citrine, Trillion, VS

1.93ct Yellow Citrine, Trillion, VS

9 x 9 mm (calibrated)

$ 14.80

View Gem
10.63ctw Violet Amethyst, Oval, Transparent

10.63ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 42.04

View Gem
1.41ct Yellow Citrine, Emerald Cut, VVS-VS

1.41ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 10.81

View Gem
1.23ct Brown Cat'S Eye Scapolite, Oval, Translucent

1.23ct Brown Cat'S Eye Scapolite, Oval, Translucent

7 x 5.3 mm

$ 6.74

View Gem
15.28ct Green Malachite, Oval, Opaque

15.28ct Green Malachite, Oval, Opaque

18 x 13 mm (calibrated)

$ 11.72

View Gem
0.60ct Violet Amethyst, Emerald Cut, VS-SI

0.60ct Violet Amethyst, Emerald Cut, VS-SI

6 x 4 mm (calibrated)

$ 3.49

View Gem
1.54ct Green Tourmaline, Oval, VS
Tourmaline Product Video (747692)

1.54ct Green Tourmaline, Oval, VS

8 x 6 mm (calibrated)

$ 178.95

View Gem
0.58ctw Blue Kyanite, Round, VS

0.58ctw Blue Kyanite, Round, VS

3.8 mm

$ 14.44

View Gem
29.68ct Gray Hematite, Pear Shape, Opaque
Hematite Product Video (516396)

29.68ct Gray Hematite, Pear Shape, Opaque

26.3 x 16.1 mm

$ 28.94

View Gem
5.28ct Pink Morganite, Pear Shape, Translucent

5.28ct Pink Morganite, Pear Shape, Translucent

15.6 x 9.8 mm

$ 21.91

View Gem
4.09ctw White Topaz, Square, VS

4.09ctw White Topaz, Square, VS

4 x 4 mm (calibrated)

$ 31.37

View Gem
6.29ct Brown Smoky Quartz, Pear Shape, VVS-VS

6.29ct Brown Smoky Quartz, Pear Shape, VVS-VS

15 x 11 mm

$ 20.68

View Gem
0.45ct Blue Kyanite, Round, SI

0.45ct Blue Kyanite, Round, SI

4.3 mm

$ 11.21

View Gem
2.72ct Yellow Citrine, Square, VVS-VS

2.72ct Yellow Citrine, Square, VVS-VS

8 x 8 mm (calibrated)

$ 15.90

View Gem
2.06ct Orange Hessonite Garnet, Oval, VS-SI

2.06ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 40.63

View Gem
1.21ctw Green Peridot, Oval, Transparent

1.21ctw Green Peridot, Oval, Transparent

6 x 4.2 mm

$ 21.70

View Gem
97.28ct Brown Tiger'S Eye, Square, Opaque

97.28ct Brown Tiger'S Eye, Square, Opaque

27.5 x 27.2 mm

$ 56.52

View Gem
5.68ct Brown Tiger'S Eye, Baguette, Opaque

5.68ct Brown Tiger'S Eye, Baguette, Opaque

14 x 10 mm (calibrated)

$ 5.66

View Gem
1 2 3
...
1103
Choose Page
1 - 1897

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

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 -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

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 have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 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