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

0.69ct Green Tourmaline, Emerald Cut, VVS

8.9 x 3.4 mm

$ 34.36

View Gem

1.27ct Pink Malaya Garnet, Marquise, VS

9.9 x 5.1 mm

$ 58.43

View Gem

7.66ct Multicolor Agate, Round, Opaque

12 mm (calibrated)

$ 12.96

View Gem

2.16ct Orange Hessonite Garnet, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 43.03

View Gem

3.92ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 8.67

View Gem

0.33ct Blue Kyanite, Round, SI

4.3 mm

$ 8.22

View Gem

2.40ct Green Tourmaline, Emerald Cut, VVS

18.7 x 3.9 mm

$ 65.74

View Gem

5.86ctw Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 40.85

View Gem

0.78ct Pink Tourmaline, Pear Shape, VVS

8 x 6 mm (calibrated)

$ 32.37

View Gem

0.15ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 268.16

View Gem

2.63ct Yellow Citrine, Oval, VVS

12 x 8 mm (calibrated)

$ 15.93

View Gem

8.14ctw Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 44.59

View Gem

3.33ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 14.59

View Gem

2.15ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 4.28

View Gem

0.92ctw Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 5.35

View Gem

0.90ct White Sillimanite Cat'S Eye, Oval, Transparent

5.4 x 5.2 mm

$ 3.59

View Gem

2.91ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 22.32

View Gem

28.69ct Red Star Garnet, Oval, Opaque

20 x 11.7 mm

$ 29.72

View Gem

6.41ct Violet Amethyst, Cushion, VVS

15 x 9.3 mm

$ 38.30

View Gem

2.24ct Orange Sunstone, Round, Translucent

8.5 mm (calibrated)

$ 13.40

View Gem

1.01ct Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 26.83

View Gem

1.43ctw Orange Hessonite Garnet, Square, VS

3.6 x 3.6 mm

$ 30.43

View Gem

4.47ct White Topaz, Round, VVS-VS

10 mm (calibrated)

$ 39.33

View Gem

1.27ct Brown Color-Change Garnet, Pear Shape, VS

7.9 x 5.4 mm

$ 101.46

View Gem
1 2 3
...
371
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

My whole experience is great.

Posted By Ghs in November, 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

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 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
Enlarged Gemstone Image