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

14.35ct Pink Kunzite, Trillion, VVS-VS

17.2 x 13.3 mm

$ 297.76

View Gem

1.67ct Violet Amethyst, Trillion, VS

8 x 8 mm (calibrated)

$ 11.04

View Gem

2.55ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 5.08

View Gem

2.98ct Gray Tourmaline, Oval, Transparent

10 x 8 mm (calibrated)

$ 54.40

View Gem

1.30ct White Sillimanite Cat'S Eye, Oval, Transparent

6.5 x 6 mm

$ 4.07

View Gem

3.91ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 17.13

View Gem

2.57ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 20.48

View Gem

1.27ct Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 27.83

View Gem

8.79ct Multicolor Agate, Sphere / Ball, Opaque

10 mm (calibrated)

$ 7.01

View Gem

0.70ct Green Chrome Diopside, Oval, VS

7 x 5 mm (calibrated)

$ 17.43

View Gem

1.61ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 176.39

View Gem

3.23ctw Green Prehnite, Oval, Transparent

7.6 x 6.3 mm

$ 17.70

View Gem

1.37ctw Yellow Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 8.65

View Gem

1.08ct Pink Tourmaline, Emerald Cut, VVS-VS

7.6 x 4.5 mm

$ 78.09

View Gem

66.25ct Violet Amethyst, Oval, VVS-VS

34.6 x 25.8 mm

$ 527.88

View Gem

6.70ct Multicolor Pietersite, Trillion, Opaque

16.8 x 15.5 mm

$ 22.02

View Gem

4.70ctw Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 10.39

View Gem

16.38ct Blue Larimar, Cushion, Opaque

23.9 x 22.6 mm

$ 197.41

View Gem

48.51ct Multicolor Jasper, Trillion, Opaque

38.1 x 27.6 mm

$ 44.29

View Gem

3.59ct Pink Tourmaline, Emerald Cut, VS-SI

11 x 6 mm

$ 177.00

View Gem

5.24ctw Brown Moonstone, Flower Cut, Translucent

9 x 9 mm (calibrated)

$ 22.97

View Gem

27.10ct Multicolor Jasper, Fancy, Opaque

30.4 x 20.7 mm

$ 29.69

View Gem

14.37ct Multicolor Boulder Opal, Oval, Opaque

16.4 x 13.1 mm

$ 100.19

View Gem

11.92ct Brown Rutile Quartz, Pear Shape, Transparent

18 x 13 mm (calibrated)

$ 32.39

View Gem
1 2 3
...
965
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

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate
Enlarged Gemstone Image