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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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27.12ctw Multicolor Fossil Coral, Oval, Opaque

21.9 x 15.8 mm

$ 53.49

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15.10ct Violet Amethyst, Oval, VVS-VS

22.1 x 14.5 mm

$ 105.28

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3.83ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 29.37

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2.95ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 54.95

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2.17ct Pink Tourmaline, Oval, Transparent

8 x 6.9 mm

$ 37.20

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1.15ct Purple Rhodolite Garnet, Oval, VS

6.7 x 5.3 mm

$ 40.09

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0.12ct Green Alexandrite, Oval, VVS-VS

4 x 3 mm (calibrated)

$ 83.66

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2.55ct Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 13.98

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0.27ct Red Spinel, Baguette, VS

5.2 x 2.8 mm

$ 22.41

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1.93ctw Multicolor Andalusite, Oval, VS-SI

6 x 4 mm (calibrated)

$ 95.16

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2.40ctw Red Pyrope Garnet, Square, VS

4.8 x 4.7 mm

$ 18.41

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6.01ct Green Peridot, Heart, VVS-VS

11.7 x 11.2 mm

$ 1,296.96

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5.26ctw Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 10.47

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9.07ct Black Tourmaline, Emerald Cut, Opaque

14 x 10 mm (calibrated)

$ 45.17

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3.35ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 23.36

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6.06ct Green Prehnite, Fancy, Transparent

15.2 x 10.8 mm

$ 9.89

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2.08ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 33.71

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0.78ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 6.22

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0.49ct Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 2.85

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1.89ctw White Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 6.22

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2.23ct Green Sphene, Oval, Transparent

7.8 x 7.2 mm

$ 11.11

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1.86ct Yellow Beryl, Trillion, VVS

9 x 9 mm (calibrated)

$ 44.46

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5.01ct Yellow Moonstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 10.03

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2.34ct Green Tourmaline, Emerald Cut, VVS-VS

16.2 x 4.1 mm

$ 64.09

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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

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate
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