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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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Yellow Untreated Gemstones
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3.23ct Yellow Citrine, Emerald Cut, Transparent

12 x 10 mm (calibrated)

$ 24.77

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2.09ct Orange Zircon, Oval, VS

8 x 6.5 mm

$ 56.74

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0.84ct Purple Spinel, Cushion, VVS-VS

6.2 x 5 mm

$ 30.04

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7.36ct Black Tourmaline, Oval, Opaque

13.4 x 11.2 mm

$ 36.65

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13.55ct Violet Amethyst, Cushion, VVS

15 x 15 mm (calibrated)

$ 94.47

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11.27ct White Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 17.78

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18.99ctw Multicolor Jasper, Trillion, Opaque

21.8 x 17.4 mm

$ 11.16

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2.80ctw White Sillimanite Cat'S Eye, Oval, Translucent

8 x 5.3 mm

$ 11.11

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4.28ct White Topaz, Heart, VVS-VS

10 x 10 mm (calibrated)

$ 35.52

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20.75ct Multicolor Jasper, Baguette, Opaque

22 x 10.9 mm

$ 11.79

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1.55ct Green Tourmaline, Emerald Cut, VVS-VS

21.7 x 3.1 mm

$ 37.05

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25.03ctw Multicolor Jasper, Pear Shape, Opaque

29.7 x 15.6 mm

$ 14.71

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0.28ct White Topaz, Marquise, VS

5.9 x 3 mm

$ 1.27

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0.75ct Green Peridot, Heart, VS

6 x 6 mm (calibrated)

$ 5.60

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2.24ct Yellow Golden Beryl, Round, VVS

9 mm (calibrated)

$ 53.99

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0.97ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 6.76

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3.20ctw Red Pyrope Garnet, Trillion, VS

4 x 4 mm (calibrated)

$ 24.54

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15.50ct Green Cat'S Eye Aquamarine, Oval, Transparent

16.1 x 14.3 mm

$ 272.39

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1.43ct Orange Zircon, Round, VVS-VS

6 mm (calibrated)

$ 31.33

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0.49ct Orange Spessartite Garnet, Oval, VS-SI

5.1 x 4.2 mm

$ 14.64

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1.65ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 7 mm (calibrated)

$ 30.73

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23.99ct Gray Hematite, Heart, Opaque

20.5 x 19.2 mm

$ 52.57

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8.57ct Multicolor Cinnabar, Cushion, Opaque

16.5 x 13.4 mm

$ 10.03

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6.99ct Brown Smoky Quartz, Round, VVS

13 mm (calibrated)

$ 13.70

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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

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

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The website was very easy to use.

Posted By Garnet in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate
Enlarged Gemstone Image