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
2.58ctw Purple Rhodolite Garnet, Trillion, VS

2.58ctw Purple Rhodolite Garnet, Trillion, VS

5 x 5 mm (calibrated)

$ 22.61

View Gem
30.27ct Multicolor Rainbow Moonstone, Fancy, Opaque

30.27ct Multicolor Rainbow Moonstone, Fancy, Opaque

39.9 x 9.9 mm

$ 3.02

View Gem
1.12ct Yellow Citrine, Emerald Cut, VVS-VS

1.12ct Yellow Citrine, Emerald Cut, VVS-VS

7.7 x 5.8 mm

$ 7.81

View Gem
1.06ctw Orange Citrine, Marquise, VS

1.06ctw Orange Citrine, Marquise, VS

7.9 x 4.1 mm

$ 5.81

View Gem
11.07ctw Blue Chalcedony, Oval, Translucent

11.07ctw Blue Chalcedony, Oval, Translucent

14 x 10 mm (calibrated)

$ 9.21

View Gem
2.46ct Orange Moonstone, Cushion, Translucent

2.46ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 4.90

View Gem
34.60ctw Multicolor Agate, Oval, Opaque

34.60ctw Multicolor Agate, Oval, Opaque

16.8 x 15.9 mm

$ 34.46

View Gem
4.47ct Pink Morganite, Pear Shape, Transparent

4.47ct Pink Morganite, Pear Shape, Transparent

14 x 9 mm (calibrated)

$ 51.38

View Gem
10.41ct Brown Tiger'S Eye, Baguette, Opaque

10.41ct Brown Tiger'S Eye, Baguette, Opaque

16 x 12 mm (calibrated)

$ 13.48

View Gem
3.02ctw White Topaz, Cushion, VVS-VS

3.02ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 16.54

View Gem
3.57ct Pink Strawberry Quartz, Oval, Translucent

3.57ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 27.38

View Gem
1.37ctw Yellow Citrine, Pear Shape, VVS-VS

1.37ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 9.01

View Gem
3.49ct Brown Smoky Quartz, Baguette, VVS-VS

3.49ct Brown Smoky Quartz, Baguette, VVS-VS

12 x 8 mm (calibrated)

$ 15.30

View Gem
28.85ct Violet Amethyst, Cushion, VVS-VS

28.85ct Violet Amethyst, Cushion, VVS-VS

23.8 x 16.6 mm

$ 229.88

View Gem
1.38ct Yellow Sphene, Oval, Transparent

1.38ct Yellow Sphene, Oval, Transparent

6.9 x 6.1 mm

$ 6.87

View Gem
21.43ct Multicolor Jasper, Cushion, Opaque

21.43ct Multicolor Jasper, Cushion, Opaque

22.2 x 18.3 mm

$ 24.65

View Gem
3.20ct Red Pyrope Garnet, Fancy, Transparent

3.20ct Red Pyrope Garnet, Fancy, Transparent

13.9 x 8 mm

$ 7.01

View Gem
2.09ct Red Almandine Garnet, Marquise, VVS-VS

2.09ct Red Almandine Garnet, Marquise, VVS-VS

12 x 6 mm (calibrated)

$ 78.06

View Gem
7.14ct Yellow Citrine, Emerald Cut, VVS

7.14ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 39.11

View Gem
82.05ct Violet Amethyst, Pear Shape, VVS
Amethyst Product Video (753795)

82.05ct Violet Amethyst, Pear Shape, VVS

39.5 x 23.4 mm

$ 681.02

View Gem
82.68ct Green Amazonite, Square, Opaque

82.68ct Green Amazonite, Square, Opaque

26.2 x 26.1 mm

$ 48.04

View Gem
10.74ct Brown Smoky Quartz, Emerald Cut, VVS-VS

10.74ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 29.42

View Gem
0.52ct Green Peridot, Marquise, VS

0.52ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 7.77

View Gem
0.48ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

0.48ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

5.5 x 3.5 mm

$ 14.34

View Gem
1 2 3
...
815
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

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
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 -> 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