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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
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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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44.42ct Yellow Obsidian, Oval, Opaque

44.42ct Yellow Obsidian, Oval, Opaque

43.1 x 27.1 mm

$ 48.66

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3.82ctw Red Pyrope Garnet, Square, VS

3.82ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 29.29

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18.33ct Violet Amethyst, Cushion, VVS

18.33ct Violet Amethyst, Cushion, VVS

20 x 15 mm (calibrated)

$ 127.80

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0.26ct Blue Iolite, Baguette, VS

0.26ct Blue Iolite, Baguette, VS

5 x 3 mm (calibrated)

$ 10.36

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0.81ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.81ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6.3 x 4 mm

$ 28.44

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3.10ct Pink Tourmaline, Emerald Cut, VS
Tourmaline Product Video (531587)

3.10ct Pink Tourmaline, Emerald Cut, VS

8 x 8 mm (calibrated)

$ 138.94

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0.54ct Red Pyrope Garnet, Heart, VVS-VS

0.54ct Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 13.45

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4.20ctw Yellow Citrine, Oval, VVS-VS

4.20ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 32.21

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1.79ct Orange Zircon, Oval, VVS-VS

1.79ct Orange Zircon, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 39.13

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5.71ct Yellow Citrine, Oval, VVS-VS

5.71ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 34.28

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2.04ct Orange Moonstone, Cushion, Translucent

2.04ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 4.07

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21.72ct Violet Amethyst, Cushion, VVS-VS

21.72ct Violet Amethyst, Cushion, VVS-VS

18 x 18 mm (calibrated)

$ 151.43

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1.84ct Pink Tourmaline, Round, Transparent

1.84ct Pink Tourmaline, Round, Transparent

7 mm (calibrated)

$ 31.54

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1.57ct Green Tourmaline, Round, Transparent

1.57ct Green Tourmaline, Round, Transparent

7.5 mm (calibrated)

$ 26.91

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3.03ctw Brown Smoky Quartz, Round, VVS-VS

3.03ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 23.24

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10.53ct Yellow Rutile Quartz, Round, Translucent

10.53ct Yellow Rutile Quartz, Round, Translucent

13 mm (calibrated)

$ 36.57

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0.21ct Orange Sphalerite, Round, SI

0.21ct Orange Sphalerite, Round, SI

3.5 mm (calibrated)

$ 10.46

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4.81ct White Topaz, Round, VS

4.81ct White Topaz, Round, VS

10 mm (calibrated)

$ 26.35

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20.61ct Brown Tiger'S Eye, Oval, Opaque

20.61ct Brown Tiger'S Eye, Oval, Opaque

24.8 x 16.7 mm

$ 41.05

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13.19ct Blue Color-Change Fluorite, Round, VS

13.19ct Blue Color-Change Fluorite, Round, VS

15 mm (calibrated)

$ 361.28

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0.69ct Orange Spessartite Garnet, Oval, VS-SI
Spessartite Garnet Product Video (596436)

0.69ct Orange Spessartite Garnet, Oval, VS-SI

6 x 4 mm (calibrated)

$ 19.53

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22.89ct Multicolor Agate, Fancy, Opaque

22.89ct Multicolor Agate, Fancy, Opaque

19.6 x 10.9 mm

$ 40.09

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4.23ctw Multicolor Spectrolite, Oval, Opaque

4.23ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 19.34

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0.28ct Violet Iolite, Baguette, VS

0.28ct Violet Iolite, Baguette, VS

5 x 3 mm (calibrated)

$ 11.16

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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

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
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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
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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

It was good. There was a large selection at prices I could afford.

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

I could see the actual gem I was buying

Posted By Bugs in December, 2025
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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
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