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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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8.57ct Green Bloodstone, Pear Shape, Opaque

15.2 x 11.7 mm

$ 32.87

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3.16ct Multicolor Fire Agate, Fancy, Opaque

10 x 8 mm (calibrated)

$ 44.52

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4.75ctw Multicolor Labradorite, Round, Translucent

8 mm (calibrated)

$ 5.78

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1.68ct Orange Citrine, Oval, VS-SI

9 x 7 mm (calibrated)

$ 16.73

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0.09ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 26.15

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10.19ct Violet Amethyst, Flower Cut, Translucent

14.7 x 13.6 mm

$ 33.50

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0.90ct Green Sphene, Oval, Transparent

5.6 x 5.1 mm

$ 4.93

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0.53ct Orange Sphalerite, Oval, SI-I1

4.8 x 4.4 mm

$ 26.39

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4.67ctw Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 34.70

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5.78ctw Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 46.06

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5.63ctw Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 34.42

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6.05ct Violet Amethyst, Oval, Transparent

14.8 x 10.6 mm

$ 36.15

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35.18ct White Scolecite, Oval, Opaque

39.2 x 21.4 mm

$ 38.55

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2.42ct Multicolor Labradorite, Baguette, Translucent

8 x 6 mm (calibrated)

$ 5.30

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0.95ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 23.66

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12.59ct Violet Charoite, Fancy, Opaque

24.2 x 12.6 mm

$ 43.01

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1.29ct Green Tourmaline, Emerald Cut, VVS-VS

13.8 x 3.4 mm

$ 64.24

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1.90ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.57

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3.12ctw Yellow Sillimanite, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 119.64

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1.25ctw Violet Amethyst, Marquise, VS

8.1 x 4.2 mm

$ 8.30

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26.25ctw Multicolor Jasper, Pear Shape, Opaque

28.5 x 15.6 mm

$ 34.51

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1.44ct Multicolor Opal, Oval, Translucent

10 x 8 mm (calibrated)

$ 66.27

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15.15ct White Rainbow Moonstone, Round, Transparent

17 mm (calibrated)

$ 271.61

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16.74ct Multicolor Jasper, Pear Shape, Opaque

22.5 x 17.8 mm

$ 10.45

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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

love the site, the experience and the products.

Posted By Ckingpots in July, 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

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate
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