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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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10.97ct Multicolor Fire Agate, Fancy, Opaque

16.6 x 13.9 mm

$ 86.06

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1.00ct Green Tourmaline, Baguette, VVS-VS

15 x 2.9 mm

$ 34.86

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10.42ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 6.13

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1.60ct Yellow Beryl, Round, VVS-VS

8 mm (calibrated)

$ 31.87

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3.55ct Violet Amethyst, Briolette, VS

11 x 7.7 mm

$ 15.55

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1.88ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 82.39

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4.16ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 22.79

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0.69ct Green Tourmaline, Emerald Cut, VVS-VS

6.8 x 3.4 mm

$ 34.36

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0.77ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

9.5 x 3.9 mm

$ 26.99

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4.75ct Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 23.66

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0.87ct Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 38.13

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4.20ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 23.01

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0.86ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 6.59

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1.76ct Green Sphene, Oval, Transparent

8.1 x 6.3 mm

$ 8.76

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0.76ct Multicolor Opal, Pear Shape, Transparent

9 x 6 mm (calibrated)

$ 18.92

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28.19ctw Multicolor Fossil Coral, Oval, Opaque

22.1 x 13.8 mm

$ 35.21

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0.64ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6.4 x 3.8 mm

$ 33.78

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0.90ct Orange Zircon, Oval, VVS-VS

6 x 4.9 mm

$ 13.45

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3.71ctw Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 25.86

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9.89ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 5.82

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3.17ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 24.31

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1.02ct Purple Spinel, Pear Shape, VVS

7.6 x 6.1 mm

$ 177.62

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3.57ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.82

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3.35ct Pink Morganite, Pear Shape, Transparent

13.7 x 7.9 mm

$ 13.90

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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

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate
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