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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
Untreated Gemstones Size
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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0.73ct Gray Sillimanite Cat'S Eye, Oval, Transparent

0.73ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.3 x 5.3 mm

$ 2.40

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16.98ct Multicolor Jasper, Oval, Opaque

16.98ct Multicolor Jasper, Oval, Opaque

31.2 x 20 mm

$ 13.95

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3.75ct Multicolor Fire Agate, Fancy, Opaque

3.75ct Multicolor Fire Agate, Fancy, Opaque

12 x 8 mm (calibrated)

$ 26.63

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52.40ct Multicolor Matrix Opal, Oval, Opaque
Matrix Opal Product Video (728379)

52.40ct Multicolor Matrix Opal, Oval, Opaque

42.8 x 27.5 mm

$ 88.73

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0.78ct Green Chrome Diopside, Marquise, VS-SI

0.78ct Green Chrome Diopside, Marquise, VS-SI

9.8 x 4.8 mm

$ 19.42

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27.93ct Black Snowflake Obsidian, Cushion, Opaque

27.93ct Black Snowflake Obsidian, Cushion, Opaque

27.3 x 23.7 mm

$ 16.42

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4.52ct Green Jade, Oval, Opaque

4.52ct Green Jade, Oval, Opaque

12 x 10 mm (calibrated)

$ 9.01

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11.23ct Turquoise Larimar, Oval, Opaque

11.23ct Turquoise Larimar, Oval, Opaque

18 x 13 mm (calibrated)

$ 134.10

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0.72ct Green Tourmaline, Baguette, VVS

0.72ct Green Tourmaline, Baguette, VVS

9.2 x 3 mm

$ 25.10

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21.01ctw Multicolor Jasper, Oval, Opaque

21.01ctw Multicolor Jasper, Oval, Opaque

22.8 x 13.7 mm

$ 12.35

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1.96ctw Multicolor Andalusite, Round, VS

1.96ctw Multicolor Andalusite, Round, VS

3.8 mm

$ 107.37

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4.43ctw Purple Rhodolite Garnet, Oval, VVS-VS
Rhodolite Garnet Product Video (735199)

4.43ctw Purple Rhodolite Garnet, Oval, VVS-VS

8.4 x 6.5 mm

$ 147.08

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1.21ctw Orange Zircon, Oval, VS

1.21ctw Orange Zircon, Oval, VS

5 x 4 mm (calibrated)

$ 30.13

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0.96ct Green Peridot, Pear Shape, VS

0.96ct Green Peridot, Pear Shape, VS

7 x 5 mm (calibrated)

$ 14.34

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0.88ct Green Peridot, Oval, VVS-VS

0.88ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 12.27

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7.63ct Brown Smoky Quartz, Emerald Cut, VVS

7.63ct Brown Smoky Quartz, Emerald Cut, VVS

12 x 12 mm (calibrated)

$ 14.97

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1.04ct Orange Citrine, Heart, VS

1.04ct Orange Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 8.63

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17.65ct Multicolor Jasper, Oval, Opaque

17.65ct Multicolor Jasper, Oval, Opaque

25 x 18 mm (calibrated)

$ 14.59

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3.89ct Green Jade, Oval, Opaque

3.89ct Green Jade, Oval, Opaque

12 x 10 mm (calibrated)

$ 7.75

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30.55ctw Multicolor Fossil Coral, Cushion, Opaque

30.55ctw Multicolor Fossil Coral, Cushion, Opaque

16 x 16 mm (calibrated)

$ 39.50

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6.07ct Black Star Diopside, Round, Opaque

6.07ct Black Star Diopside, Round, Opaque

11 mm (calibrated)

$ 30.23

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0.52ct Orange Sphalerite, Oval, SI

0.52ct Orange Sphalerite, Oval, SI

4.8 x 4.3 mm

$ 25.90

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0.92ct Green Sphene, Oval, VS-SI

0.92ct Green Sphene, Oval, VS-SI

6.6 x 5.5 mm

$ 55.44

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18.25ct Violet Amethyst, Cushion, VVS

18.25ct Violet Amethyst, Cushion, VVS

20 x 15 mm (calibrated)

$ 127.24

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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

Very pleasant

Posted By Varun in June, 2026
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Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
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Overall Rating -> 10 star ratings

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

Posted By CLTCJH in February, 2026
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Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
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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

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
Source: Bizrate
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