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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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2.30ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 5.09

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1.12ct Red Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 20.45

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14.99ct White Rainbow Moonstone, Oval, Transparent

19.8 x 12.8 mm

$ 223.95

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10.33ct Multicolor Quartz With Marcasite, Oval, Transparent

18 x 13 mm (calibrated)

$ 66.09

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2.62ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 18.27

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3.68ctw Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 29.32

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4.13ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 32.91

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3.34ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 25.61

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26.70ct Multicolor Jasper, Pear Shape, Opaque

29 x 26.2 mm

$ 22.53

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10.53ct Multicolor Amethyst Geode Slice, Fancy, Transparent

18.8 x 14 mm

$ 11.22

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2.41ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.21

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1.54ct Purple Spinel, Cushion, VVS-VS

6.6 x 6.2 mm

$ 113.38

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3.77ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 80.18

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149.79ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

52 x 35.5 mm

$ 149.19

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1.65ct Multicolor Spectrolite, Round, Opaque

8 mm (calibrated)

$ 7.87

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38.56ct Multicolor Rainbow Moonstone, Fancy, Opaque

39.8 x 11 mm

$ 3.84

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14.20ct Brown Tiger'S Eye, Marquise, Opaque

26.7 x 13.8 mm

$ 15.55

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2.43ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.31

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14.06ctw Pink Moonstone, Flower Cut, Translucent

11 x 11 mm (calibrated)

$ 56.02

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1.56ct Violet Amethyst, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 11.96

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1.38ctw Green Demantoid Garnet, Oval, VS-SI

5 x 4 mm (calibrated)

$ 151.19

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3.32ctw Yellow Citrine, Square, VVS-VS

7 x 7 mm (calibrated)

$ 25.46

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6.25ct Yellow Citrine, Round, VVS

12 mm (calibrated)

$ 47.94

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19.12ct Brown Tiger'S Eye, Oval, Opaque

21.9 x 16.1 mm

$ 41.89

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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

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
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Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
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Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
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Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
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Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate
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