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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Red Untreated Gemstones
Turquoise Untreated Gemstones
Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
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25.71ct Multicolor Jasper, Oval, Opaque

30.7 x 20.6 mm

$ 21.12

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41.15ct Gray Hematite, Round, Opaque

21.6 mm

$ 34.43

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19.73ct Violet Amethyst, Emerald Cut, VVS

18.3 x 14.3 mm

$ 137.56

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26.75ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

33.6 x 14.7 mm

$ 26.64

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22.30ct Brown Jasper, Fancy, Opaque

40.2 x 12.3 mm

$ 34.20

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3.93ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 8.68

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10.13ctw Green Amazonite, Round, Opaque

8 mm (calibrated)

$ 24.75

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2.61ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 14.30

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27.12ct Brown Moonstone, Oval, Translucent

22.1 x 15.9 mm

$ 59.42

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9.77ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 5.74

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4.65ctw Yellow Citrine, Oval, VS

10 x 8 mm (calibrated)

$ 25.48

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8.09ct Green Seraphinite, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 12.56

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41.22ct Green Bloodstone, Oval, Opaque

28.6 x 21.2 mm

$ 61.59

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1.87ct Orange Hessonite Garnet, Oval, VS

8.2 x 6.9 mm

$ 33.58

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5.42ct Yellow Citrine, Oval, VVS

14 x 10 mm (calibrated)

$ 32.54

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9.58ct Yellow Rutile Quartz, Round, Transparent

14 mm (calibrated)

$ 26.04

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2.78ctw Orange Moonstone, Cushion, Translucent

7 x 7 mm (calibrated)

$ 5.54

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1.95ct Green Peridot, Cushion, VS

7.9 x 7.3 mm

$ 76.48

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6.64ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 50.93

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6.69ctw Yellow Prehnite, Oval, Transparent

7.2 x 6.6 mm

$ 51.30

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8.86ct Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 11.47

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3.04ct Multicolor Opal, Pear Shape, Translucent

12 x 10 mm (calibrated)

$ 84.35

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1.21ctw Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 18.08

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29.31ctw Multicolor Fossil Coral, Oval, Opaque

22.2 x 13.8 mm

$ 36.60

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

Enjoy viewing the selections. Excellent product

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

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
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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