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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
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Yellow Untreated Gemstones
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1.05ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 41.83

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1.17ct White Sillimanite Cat'S Eye, Oval, Transparent

6.5 x 6.4 mm

$ 4.66

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0.50ct Green Cat'S Eye Alexandrite, Oval, Opaque

5.4 x 3.1 mm

$ 83.00

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3.88ctw Red Pyrope Garnet, Marquise, VVS-VS

12.2 x 6.1 mm

$ 31.99

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26.13ct Violet Charoite, Cushion, Opaque

28.4 x 16.1 mm

$ 41.80

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21.82ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 152.13

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5.57ct Violet Amethyst, Marquise, Transparent

17.1 x 9.1 mm

$ 33.28

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29.05ct Green Maw-Sit-Sit, Oval, Opaque

18.2 x 15 mm

$ 95.48

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16.72ct Multicolor Fossil Coral, Cushion, Opaque

21 x 13 mm

$ 21.61

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1.00ct Yellow Color-Change Diaspore, Marquise, VVS-VS

10.8 x 5.3 mm

$ 53.78

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0.87ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 19.07

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1.52ct Multicolor Opal, Oval, Transparent

11.1 x 8.2 mm

$ 37.85

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0.98ct Pink Morganite, Oval, VVS

7.7 x 5.8 mm

$ 39.04

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10.99ct Green Uvarovite Garnet Drusy, Fancy, Opaque

18 x 13 mm (calibrated)

$ 16.43

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2.38ctw Orange Spessartite Garnet, Round, VS

4.7 mm

$ 80.83

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6.14ct Brown Smoky Quartz, Round, Transparent

12 mm (calibrated)

$ 25.76

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23.00ct Blue Turquoise, Oval, Opaque

20.3 x 16.4 mm

$ 68.72

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3.31ct Multicolor Agate, Oval, Opaque

9.7 x 8.8 mm

$ 5.61

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2.15ct Orange Hessonite Garnet, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 35.91

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10.64ct Turquoise Grandidierite, Oval, Translucent

14 x 12 mm (calibrated)

$ 349.71

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1.67ctw Orange Morganite, Oval, VS

7.9 x 5.7 mm

$ 100.64

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3.03ct Orange Moonstone, Marquise, Translucent

14 x 7 mm (calibrated)

$ 6.03

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2.14ct Orange Hessonite Garnet, Oval, VS

8.4 x 7 mm

$ 37.78

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1.30ct White Rainbow Moonstone, Oval, Transparent

8.4 x 6.4 mm

$ 42.74

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

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate
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