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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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1.79ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 3.59

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29.38ct White Dendritic Agate, Pear Shape, Opaque

34.4 x 21.1 mm

$ 20.48

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1.72ct Orange Hessonite Garnet, Oval, VVS-VS

7.7 x 6.4 mm

$ 34.26

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65.45ct Violet Charoite, Cushion, Opaque

36.1 x 29.4 mm

$ 107.57

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0.89ct Green Chrome Diopside, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 22.16

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2.00ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 39.44

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25.07ctw Green Aventurine, Fancy, Translucent

26.3 x 11.5 mm

$ 49.94

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1.34ct Brown Sillimanite Cat'S Eye, Oval, Transparent

7.5 x 4.7 mm

$ 4.00

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3.92ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 30.06

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3.22ct Red Almandine Garnet, Pear Shape, VVS-VS

12 x 8 mm (calibrated)

$ 26.73

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30.27ct Multicolor Jasper, Pear Shape, Opaque

34.2 x 16.7 mm

$ 33.17

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7.70ct Pink Rose Quartz, Square, Transparent

12 x 12 mm (calibrated)

$ 42.18

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36.54ctw Gray Hematite, Baguette, Opaque

17.1 x 12.9 mm

$ 35.62

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8.17ct Black Tourmaline, Emerald Cut, Opaque

17.3 x 7.3 mm

$ 40.69

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1.31ct Purple Spinel, Cushion, VVS-VS

6.4 x 6.2 mm

$ 103.34

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1.73ct Yellow Sphene, Oval, Transparent

7 x 6.5 mm

$ 8.62

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0.59ct Green Cat'S Eye Alexandrite, Oval, Opaque

4.8 x 4.5 mm

$ 122.43

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0.81ct Purple Spinel, Oval, VVS-VS

5.7 x 5 mm

$ 67.23

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1.65ct Green Tourmaline, Emerald Cut, VVS

17.3 x 3.3 mm

$ 45.20

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0.87ct Yellow Color-Change Diaspore, Cushion, VS

5.7 x 5.6 mm

$ 45.92

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0.94ctw Green Tsavorite Garnet, Round, VS

3.8 mm

$ 150.85

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18.08ct Multicolor Rainbow Pyrite, Baguette, Opaque

22 x 14.9 mm

$ 46.65

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1.14ct Pink Tourmaline, Emerald Cut, VVS-VS

7.5 x 4.7 mm

$ 86.19

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4.79ct Blue Larimar, Pear Shape, Opaque

19.1 x 12.4 mm

$ 55.10

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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 -> 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
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Overall Rating -> 10 star ratings

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
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Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
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Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
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Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
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Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
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