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
1.74ct Multicolor Opal, Oval, Transparent

1.74ct Multicolor Opal, Oval, Transparent

11.4 x 8.1 mm

$ 80.07

View Gem
0.82ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

0.82ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

6 x 5 mm

$ 12.19

View Gem
8.08ct Brown Tiger'S Eye, Baguette, Opaque

8.08ct Brown Tiger'S Eye, Baguette, Opaque

14 x 10 mm (calibrated)

$ 8.05

View Gem
5.51ct Brown Smoky Quartz, Emerald Cut, VVS-VS

5.51ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 10.1 mm

$ 24.14

View Gem
1.46ct Orange Hessonite Garnet, Round, VS

1.46ct Orange Hessonite Garnet, Round, VS

6.5 mm (calibrated)

$ 27.19

View Gem
2.81ctw Red Pyrope Garnet, Square, VS

2.81ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 19.59

View Gem
3.43ct Yellow Citrine, Square, VVS-VS

3.43ct Yellow Citrine, Square, VVS-VS

8.7 x 8.6 mm

$ 26.30

View Gem
3.53ctw Orange Moonstone, Cushion, Translucent

3.53ctw Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 7.03

View Gem
1.66ct Purple Spinel, Cushion, VS

1.66ct Purple Spinel, Cushion, VS

7.1 x 5.6 mm

$ 115.74

View Gem
14.38ct Green Druzy Variscite, Fancy, Opaque

14.38ct Green Druzy Variscite, Fancy, Opaque

19.1 x 15.1 mm

$ 20.05

View Gem
2.74ct Violet Amethyst, Trillion, VS

2.74ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.83

View Gem
1.81ct Pink Malaya Garnet, Round, VS

1.81ct Pink Malaya Garnet, Round, VS

7.5 mm (calibrated)

$ 79.32

View Gem
1.35ct Green Tourmaline, Emerald Cut, VS

1.35ct Green Tourmaline, Emerald Cut, VS

9 x 4.7 mm

$ 67.23

View Gem
1.61ct White Sillimanite Cat'S Eye, Oval, Transparent

1.61ct White Sillimanite Cat'S Eye, Oval, Transparent

6.7 x 5.4 mm

$ 6.02

View Gem
3.00ct Violet Amethyst, Trillion, VVS-VS

3.00ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 20.92

View Gem
0.56ct Multicolor Opal, Pear Shape, Transparent

0.56ct Multicolor Opal, Pear Shape, Transparent

7 x 5 mm (calibrated)

$ 13.94

View Gem
67.17ct Multicolor Coral, Marquise, Opaque

67.17ct Multicolor Coral, Marquise, Opaque

64.2 x 22.8 mm

$ 98.61

View Gem
24.44ctw Multicolor Fossil Coral, Oval, Opaque

24.44ctw Multicolor Fossil Coral, Oval, Opaque

19.3 x 13.7 mm

$ 48.20

View Gem
3.30ct Brown Tiger'S Eye, Oval, Opaque

3.30ct Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 3.29

View Gem
0.80ct Orange Zircon, Oval, VVS

0.80ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 11.95

View Gem
1.79ct Pink Strawberry Quartz, Oval, Translucent

1.79ct Pink Strawberry Quartz, Oval, Translucent

9 x 7 mm (calibrated)

$ 13.73

View Gem
19.94ct Gray Hematite, Emerald Cut, Opaque

19.94ct Gray Hematite, Emerald Cut, Opaque

20.4 x 14.1 mm

$ 21.85

View Gem
1.14ctw Brown Smoky Quartz, Oval, Translucent

1.14ctw Brown Smoky Quartz, Oval, Translucent

6 x 4 mm (calibrated)

$ 4.24

View Gem
15.14ct Green Bloodstone, Pear Shape, Opaque

15.14ct Green Bloodstone, Pear Shape, Opaque

19.6 x 13.9 mm

$ 37.70

View Gem
1 2 3
...
72
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 -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim 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

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

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