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
1.18ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.18ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.5 x 4.8 mm

$ 3.88

View Gem
0.67ct Green Peridot, Oval, VS

0.67ct Green Peridot, Oval, VS

6.6 x 4.8 mm

$ 9.35

View Gem
4.05ctw Multicolor Andalusite, Round, VS
Andalusite Product Video (382328)

4.05ctw Multicolor Andalusite, Round, VS

3.3 mm

$ 178.07

View Gem
4.91ct Multicolor Labradorite, Marquise, Translucent

4.91ct Multicolor Labradorite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 10.86

View Gem
3.71ct Pink Rose Quartz, Emerald Cut, Transparent

3.71ct Pink Rose Quartz, Emerald Cut, Transparent

9.6 x 9.4 mm

$ 20.33

View Gem
28.77ct Multicolor Jasper, Oval, Opaque

28.77ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 16.72

View Gem
9.81ct Multicolor Pietersite, Trillion, Opaque
Pietersite Product Video (596428)

9.81ct Multicolor Pietersite, Trillion, Opaque

17.6 x 16.1 mm

$ 32.24

View Gem
3.33ct Yellow Rutile Topaz, Pear Shape, Transparent

3.33ct Yellow Rutile Topaz, Pear Shape, Transparent

13.9 x 7.3 mm

$ 69.10

View Gem
2.52ct Orange Moonstone, Marquise, Translucent

2.52ct Orange Moonstone, Marquise, Translucent

14 x 7 mm (calibrated)

$ 5.02

View Gem
37.81ct Red Star Garnet, Oval, Opaque

37.81ct Red Star Garnet, Oval, Opaque

21 x 16.6 mm

$ 37.28

View Gem
4.13ct Multicolor Labradorite, Pear Shape, Translucent

4.13ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 9.13

View Gem
3.92ct Yellow Citrine, Pear Shape, VVS-VS

3.92ct Yellow Citrine, Pear Shape, VVS-VS

14 x 9 mm (calibrated)

$ 27.33

View Gem
11.50ct Multicolor Jasper, Fancy, Opaque

11.50ct Multicolor Jasper, Fancy, Opaque

20.2 x 13.6 mm

$ 7.19

View Gem
1.84ct Pink Tourmaline, Oval, Transparent

1.84ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 31.54

View Gem
3.71ct Brown Rutile Quartz, Round, Transparent

3.71ct Brown Rutile Quartz, Round, Transparent

9 mm (calibrated)

$ 12.19

View Gem
0.14ct Yellow Diamond, Round, VVS-VS
Diamond Product Video (564574)

0.14ct Yellow Diamond, Round, VVS-VS

3.2 mm

$ 232.35

View Gem
5.56ct Black Star Diopside, Oval, Opaque

5.56ct Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 27.69

View Gem
3.64ct Violet Amethyst, Pear Shape, VS-SI

3.64ct Violet Amethyst, Pear Shape, VS-SI

13.4 x 9.7 mm

$ 29.00

View Gem
2.28ct Pink Morganite, Trillion, Transparent

2.28ct Pink Morganite, Trillion, Transparent

9 x 9 mm (calibrated)

$ 24.98

View Gem
28.20ct Multicolor Jasper, Oval, Opaque

28.20ct Multicolor Jasper, Oval, Opaque

27 x 20 mm (calibrated)

$ 22.56

View Gem
6.02ct Multicolor Labradorite, Pear Shape, Translucent

6.02ct Multicolor Labradorite, Pear Shape, Translucent

14 x 10 mm (calibrated)

$ 13.30

View Gem
7.62ct Multicolor Fire Agate, Fancy, Translucent

7.62ct Multicolor Fire Agate, Fancy, Translucent

16.6 x 11.3 mm

$ 65.54

View Gem
1.04ct Yellow Color-Change Diaspore, Cushion, VVS

1.04ct Yellow Color-Change Diaspore, Cushion, VVS

6.5 x 5 mm

$ 54.90

View Gem
3.84ctw Brown Smoky Quartz, Round, VS

3.84ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 8.42

View Gem
1 2 3
...
715
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

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

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