X
Gemstone Search
90,000+ Happy Customers
20+ Years In Business
Call Us Mon–Fri 8am–5pm

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

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
1.08ct Yellow Citrine, Round, VVS

1.08ct Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 8.61

View Gem
5.18ctw Pink Strawberry Quartz, Oval, Transparent

5.18ctw Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 38.49

View Gem
2.07ct Green Prehnite, Round, Transparent

2.07ct Green Prehnite, Round, Transparent

7.5 mm (calibrated)

$ 11.16

View Gem
1.51ctw Red Rhodolite Garnet, Square, VS

1.51ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.21

View Gem
1.63ct Yellow Citrine, Trillion, VVS

1.63ct Yellow Citrine, Trillion, VVS

8 x 8 mm (calibrated)

$ 11.36

View Gem
0.41ct Orange Spessartite Garnet, Oval, VS-SI

0.41ct Orange Spessartite Garnet, Oval, VS-SI

4.6 x 3.7 mm

$ 14.29

View Gem
2.05ct Purple Tourmaline, Cushion, VS
Tourmaline Product Video (742820)

2.05ct Purple Tourmaline, Cushion, VS

8.1 x 7.6 mm

$ 255.23

View Gem
4.80ctw Yellow Citrine, Fancy, VVS-VS

4.80ctw Yellow Citrine, Fancy, VVS-VS

14.1 x 7 mm

$ 26.29

View Gem
12.36ctw Multicolor Pietersite, Round, Opaque
Pietersite Product Video (672464)

12.36ctw Multicolor Pietersite, Round, Opaque

15 mm (calibrated)

$ 28.93

View Gem
0.48ct Green Peridot, Marquise, VS

0.48ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 7.17

View Gem
90.73ct Blue Sodalite, Square, Opaque

90.73ct Blue Sodalite, Square, Opaque

27.2 x 27 mm

$ 75.31

View Gem
9.28ct Multicolor Pietersite, Pear Shape, Opaque

9.28ct Multicolor Pietersite, Pear Shape, Opaque

21.5 x 12 mm

$ 30.81

View Gem
5.55ctw Violet Amethyst, Trillion, VVS-VS

5.55ctw Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 38.69

View Gem
2.61ct Violet Amethyst, Trillion, VS

2.61ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 20.02

View Gem
1.33ct Yellow Beryl, Oval, VVS

1.33ct Yellow Beryl, Oval, VVS

8.9 x 6.7 mm

$ 26.49

View Gem
4.28ct Red Almandine Garnet, Oval, VS

4.28ct Red Almandine Garnet, Oval, VS

11.5 x 9 mm

$ 149.20

View Gem
7.36ct Multicolor Agate, Oval, Opaque

7.36ct Multicolor Agate, Oval, Opaque

12.3 x 11.1 mm

$ 6.96

View Gem
1.37ct White Sillimanite Cat'S Eye, Oval, Translucent

1.37ct White Sillimanite Cat'S Eye, Oval, Translucent

7 x 5 mm (calibrated)

$ 4.12

View Gem
1.62ct Yellow Citrine, Emerald Cut, VVS

1.62ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 12.91

View Gem
3.64ctw Red Pyrope Garnet, Marquise, VVS-VS

3.64ctw Red Pyrope Garnet, Marquise, VVS-VS

11.9 x 6 mm

$ 36.01

View Gem
1.27ctw Green Demantoid Garnet, Oval, VS

1.27ctw Green Demantoid Garnet, Oval, VS

4 x 3.3 mm

$ 139.14

View Gem
4.75ctw Green Prehnite, Round, Transparent

4.75ctw Green Prehnite, Round, Transparent

7.5 mm (calibrated)

$ 25.81

View Gem
9.55ct Brown Moonstone, Oval, Translucent

9.55ct Brown Moonstone, Oval, Translucent

14 x 10 mm (calibrated)

$ 21.03

View Gem
1.90ct Pink Morganite, Round, Transparent

1.90ct Pink Morganite, Round, Transparent

8 mm (calibrated)

$ 20.61

View Gem
1 2 3
...
326
Choose Page
1 - 1895

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

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

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

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 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 -> 10 star ratings

Found a rock that met my need. Bought it!

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