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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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26.57ctw Black Spinel, Baguette, Opaque

20.2 x 10.2 mm

$ 79.39

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6.57ct Green Malachite, Oval, Opaque

13.8 x 9.5 mm

$ 6.54

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6.14ct Pink Strawberry Quartz, Oval, Translucent

14 x 10 mm (calibrated)

$ 37.00

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1.17ct Green Sphene, Oval, Transparent

6.3 x 6 mm

$ 5.83

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28.92ct Multicolor Jasper, Oval, Translucent

32.9 x 21.5 mm

$ 15.84

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5.91ct Green Actinolite Cat'S Eye, Oval, Translucent

13.1 x 10.5 mm

$ 41.20

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1.27ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 18.14

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3.74ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 22.87

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11.93ctw Green Seraphinite, Pear Shape, Opaque

14 x 10 mm (calibrated)

$ 19.61

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4.66ctw Green Prehnite, Oval, Transparent

8.5 x 7.1 mm

$ 25.53

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1.58ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 9.87

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0.94ct Orange Hessonite Garnet, Cushion, SI

5.3 x 5.2 mm

$ 18.53

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2.74ct Black Star Diopside, Round, Opaque

8 mm (calibrated)

$ 11.37

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28.79ct White Scolecite, Cushion, Opaque

31.9 x 18.8 mm

$ 31.54

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7.96ct Multicolor Coral, Oval, Opaque

19 x 13.5 mm

$ 17.44

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3.22ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 24.15

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0.79ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

7.7 x 5.3 mm

$ 27.73

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2.51ct Orange Sunstone, Oval, Transparent

10 x 8 mm (calibrated)

$ 19.12

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8.69ct Pink Strawberry Quartz, Oval, Translucent

14 x 12 mm (calibrated)

$ 64.65

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0.63ct Yellow Color-Change Diaspore, Oval, VS

6.5 x 4.1 mm

$ 22.12

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0.17ct Black Diamond, Square, Opaque

2.5 x 2.4 mm

$ 84.66

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11.65ct Green Jadeite, Oval, Translucent

18.7 x 13.9 mm

$ 25.53

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4.35ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 20.50

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8.44ct Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 8.41

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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 -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
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Overall Rating -> 10 star ratings

The website was very easy to use.

Posted By Garnet in January, 2026
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Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
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Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate
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