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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
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Untreated Gemstones Treatment

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5.14ct Turquoise Grandidierite, Oval, VS-SI

5.14ct Turquoise Grandidierite, Oval, VS-SI

11.5 x 9.5 mm

$ 225.25

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1.16ct Multicolor Opal, Oval, Transparent

1.16ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 53.38

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1.05ct White Sillimanite Cat'S Eye, Oval, Transparent

1.05ct White Sillimanite Cat'S Eye, Oval, Transparent

6 x 6 mm (calibrated)

$ 4.03

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3.92ct Violet Amethyst, Pear Shape, VVS

3.92ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 28.48

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29.70ct Multicolor Jasper, Oval, Opaque

29.70ct Multicolor Jasper, Oval, Opaque

28.7 x 21.5 mm

$ 39.38

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7.53ct Pink Rose Quartz, Emerald Cut, Transparent

7.53ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 41.25

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14.86ct Multicolor Coral, Oval, Translucent

14.86ct Multicolor Coral, Oval, Translucent

23.6 x 14.6 mm

$ 46.41

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1.42ct White Sillimanite Cat'S Eye, Oval, Transparent

1.42ct White Sillimanite Cat'S Eye, Oval, Transparent

8 x 5 mm (calibrated)

$ 4.67

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23.01ct Pink Rose Quartz, Oval, Transparent/Translucent

23.01ct Pink Rose Quartz, Oval, Transparent/Translucent

20 x 14 mm

$ 34.03

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1.31ctw Multicolor Opal, Oval, Transparent

1.31ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 57.41

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6.62ct Brown Smoky Quartz, Round, VVS-VS

6.62ct Brown Smoky Quartz, Round, VVS-VS

13 mm (calibrated)

$ 8.06

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7.80ct Brown Star Moonstone, Oval, Translucent

7.80ct Brown Star Moonstone, Oval, Translucent

13.5 x 10.7 mm

$ 34.18

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4.27ct Pink Strawberry Quartz, Oval, Translucent

4.27ct Pink Strawberry Quartz, Oval, Translucent

11 x 9 mm (calibrated)

$ 33.37

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7.50ct Yellow Rutile Quartz, Round, Transparent

7.50ct Yellow Rutile Quartz, Round, Transparent

13 mm (calibrated)

$ 32.87

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1.54ctw Red Rhodolite Garnet, Square, VS

1.54ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.48

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4.35ctw Multicolor Labradorite, Baguette, Translucent

4.35ctw Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 5.98

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36.81ct Violet Amethyst, Oval, VVS
Amethyst Product Video (734684)

36.81ct Violet Amethyst, Oval, VVS

25 x 17.3 mm

$ 244.42

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16.42ct Multicolor Agate, Oval, Opaque

16.42ct Multicolor Agate, Oval, Opaque

17.7 x 15.6 mm

$ 27.80

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1.83ctw Orange Sunstone, Oval, Translucent

1.83ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 12.76

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3.92ctw Orange Moonstone, Trillion, Translucent

3.92ctw Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 7.81

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45.70ct Blue Turquoise, Oval, Opaque

45.70ct Blue Turquoise, Oval, Opaque

32.6 x 18.5 mm

$ 136.55

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7.67ctw Pink Moonstone, Flower Cut, Translucent

7.67ctw Pink Moonstone, Flower Cut, Translucent

10 x 10 mm (calibrated)

$ 16.80

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0.47ct Blue Kyanite, Round, SI

0.47ct Blue Kyanite, Round, SI

4.2 mm

$ 11.70

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11.45ctw Violet Amethyst, Oval, Transparent

11.45ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 45.28

View Gem
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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

I could see the actual gem I was buying

Posted By Bugs in December, 2025
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good navigation and simple interface.

Posted By Dave in April, 2026
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Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
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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
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Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
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Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
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