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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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4.00ctw Violet Amethyst, Oval, VS

6 x 4 mm (calibrated)

$ 21.91

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0.80ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

8.6 x 4.2 mm

$ 28.05

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1.03ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6 x 6 mm (calibrated)

$ 31.59

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36.14ct Multicolor Jasper, Oval, Opaque

29.8 x 24.3 mm

$ 39.59

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33.32ctw Multicolor Jasper, Cushion, Opaque

22.5 x 16.5 mm

$ 19.58

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2.16ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.30

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0.80ct Black Diamond, Round, Opaque

5.3 mm

$ 637.44

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36.78ct Black Obsidian, Oval, Opaque

33.7 x 22.4 mm

$ 18.32

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1.90ct Yellow Zircon, Round, VVS-VS

7 mm (calibrated)

$ 34.69

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3.59ctw Orange Sunstone, Oval, Translucent

7 x 5 mm (calibrated)

$ 27.53

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3.95ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 31.47

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47.43ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

28.8 x 21.6 mm

$ 21.73

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12.72ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 101.35

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1.90ct Orange Citrine, Round, VVS-VS

8 mm (calibrated)

$ 15.77

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1.80ctw Red Pyrope Garnet, Pear Shape, VVS-VS

8 x 5 mm (calibrated)

$ 7.89

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2.63ctw Violet Amethyst, Oval, VVS-VS

6.1 x 4.2 mm

$ 14.41

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6.62ctw White Moonstone, Round, Translucent

9 mm (calibrated)

$ 18.14

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0.90ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 7.89

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3.25ctw Orange Sunstone, Oval, Translucent

7 x 5 mm (calibrated)

$ 18.63

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2.88ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 22.09

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27.37ctw Multicolor Fossil Coral, Oval, Opaque

20.9 x 13.4 mm

$ 31.08

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4.38ct Multicolor Opal, Oval, Translucent

15.2 x 11.2 mm

$ 109.06

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18.39ct Green Bloodstone, Oval, Opaque

20.9 x 15.2 mm

$ 27.48

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1.15ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.68

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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

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate
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