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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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4.52ct Pink Strawberry Quartz, Oval, Translucent

11 x 9 mm (calibrated)

$ 34.66

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0.83ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

5.8 x 4.2 mm

$ 25.46

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2.98ctw Green Prehnite, Round, Transparent

5.5 mm (calibrated)

$ 16.19

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2.25ctw Red Rhodolite Garnet, Square, VS

4.8 x 4.7 mm

$ 19.70

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1.43ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 21.26

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1.02ct Pink Tourmaline, Oval, Transparent

7.4 x 5.9 mm

$ 16.90

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4.44ct Red Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 23.44

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27.07ctw Multicolor Jasper, Cushion, Opaque

21.2 x 15.4 mm

$ 15.90

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2.41ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7.6 mm

$ 38.79

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1.29ct Green Tourmaline, Oval, Transparent

7.7 x 5.7 mm

$ 17.82

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2.04ct Multicolor Labradorite, Baguette, Translucent

8 x 6 mm (calibrated)

$ 4.47

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1.79ctw Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 28.53

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1.80ct Green Tourmaline, Emerald Cut, VVS-VS

17.9 x 3.3 mm

$ 49.30

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63.74ct Violet Charoite, Cushion, Opaque

36.4 x 25.2 mm

$ 104.75

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5.97ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 8.92

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1.18ct Purple Spinel, Cushion, VS

6.4 x 5.3 mm

$ 88.14

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18.34ct Brown Moonstone, Oval, Opaque

20 x 15 mm (calibrated)

$ 40.19

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19.35ct Violet Amethyst, Cushion, VVS

20 x 15 mm (calibrated)

$ 134.91

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3.81ctw Red Pyrope Garnet, Marquise, VVS

12.1 x 6 mm

$ 33.40

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1.97ctw Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 32.65

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1.29ct White Sillimanite Cat'S Eye, Oval, Transparent

6.5 x 6.2 mm

$ 4.95

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7.48ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 29.58

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4.52ct Green Jade, Oval, Opaque

12 x 10 mm (calibrated)

$ 9.01

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2.74ct Yellow Rutile Quartz, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 7.38

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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

Easy process.

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

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
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Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
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Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
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Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
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Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
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