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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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2.78ct Violet Amethyst, Trillion, VS

2.78ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.32

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46.37ct Multicolor Jasper, Oval, Opaque

46.37ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 27.43

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1.91ct Yellow Citrine, Square, VVS-VS

1.91ct Yellow Citrine, Square, VVS-VS

7.6 x 7.5 mm

$ 11.17

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8.80ct Brown Smoky Quartz, Flower Cut, Transparent/Translucent

8.80ct Brown Smoky Quartz, Flower Cut, Transparent/Translucent

13 x 13 mm (calibrated)

$ 20.45

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12.21ct Black Tourmaline, Heart, Opaque

12.21ct Black Tourmaline, Heart, Opaque

15.7 x 14.6 mm

$ 50.67

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4.69ct Green Druzy Variscite, Fancy, Opaque

4.69ct Green Druzy Variscite, Fancy, Opaque

16 x 12 mm (calibrated)

$ 4.81

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1.14ct Violet Amethyst, Square, VVS-VS

1.14ct Violet Amethyst, Square, VVS-VS

6.1 x 5.7 mm

$ 9.08

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0.83ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

0.83ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

10.9 x 4 mm

$ 29.10

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12.13ct Violet Amethyst, Cushion, VVS

12.13ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 96.65

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44.33ctw Brown Tiger'S Eye, Fancy, Opaque

44.33ctw Brown Tiger'S Eye, Fancy, Opaque

32.4 x 9.1 mm

$ 24.29

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3.71ct Pink Rose Quartz, Emerald Cut, Transparent

3.71ct Pink Rose Quartz, Emerald Cut, Transparent

9.5 x 9.4 mm

$ 20.33

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1.10ct Orange Zircon, Oval, VVS

1.10ct Orange Zircon, Oval, VVS

6 x 4.9 mm

$ 16.43

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1.62ct Yellow Citrine, Baguette, VS

1.62ct Yellow Citrine, Baguette, VS

9.8 x 5 mm

$ 12.42

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1.60ct Green Tourmaline, Emerald Cut, VVS-VS

1.60ct Green Tourmaline, Emerald Cut, VVS-VS

16.3 x 3.4 mm

$ 33.90

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1.33ct Green Tourmaline, Emerald Cut, VVS-VS

1.33ct Green Tourmaline, Emerald Cut, VVS-VS

12.6 x 3.7 mm

$ 33.12

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3.73ct Yellow Apatite, Pear Shape, VS
Apatite Product Video (514780)

3.73ct Yellow Apatite, Pear Shape, VS

10 x 10 mm (calibrated)

$ 192.07

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0.99ct Green Peridot, Cushion, VVS-VS

0.99ct Green Peridot, Cushion, VVS-VS

7.8 x 5.6 mm

$ 16.28

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0.78ct Green Peridot, Oval, VVS

0.78ct Green Peridot, Oval, VVS

7 x 5 mm (calibrated)

$ 10.87

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21.38ct White Howlite, Cushion, Opaque

21.38ct White Howlite, Cushion, Opaque

26.1 x 18 mm

$ 9.57

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4.31ct Brown Rutile Topaz, Emerald Cut, Transparent
Rutile Topaz Product Video (753630)

4.31ct Brown Rutile Topaz, Emerald Cut, Transparent

11.6 x 7.8 mm

$ 89.43

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0.03ct Black Diamond, Round, Transparent

0.03ct Black Diamond, Round, Transparent

2 mm (calibrated)

$ 10.27

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6.53ct Multicolor Labradorite, Pear Shape, Translucent

6.53ct Multicolor Labradorite, Pear Shape, Translucent

13.7 x 9.6 mm

$ 14.44

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0.89ctw Green Peridot, Oval, Transparent

0.89ctw Green Peridot, Oval, Transparent

6.1 x 4.2 mm

$ 15.95

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11.88ct Brown Smoky Quartz, Emerald Cut, VVS-VS

11.88ct Brown Smoky Quartz, Emerald Cut, VVS-VS

14 x 14 mm (calibrated)

$ 14.70

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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 liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I've been looking for.

Posted By Tree Dog in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
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

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate
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