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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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1.57ct Violet Amethyst, Marquise, VS-SI

1.57ct Violet Amethyst, Marquise, VS-SI

12 x 6.2 mm

$ 12.04

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0.43ct Green Tourmaline, Baguette, VVS

0.43ct Green Tourmaline, Baguette, VVS

6.1 x 3 mm

$ 14.99

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1.46ctw Yellow Citrine, Pear Shape, VVS-VS

1.46ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 11.64

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0.74ct Yellow Citrine, Heart, VVS-VS

0.74ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 5.16

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1.33ct Red Almandine Garnet, Heart, VVS

1.33ct Red Almandine Garnet, Heart, VVS

7 x 7 mm (calibrated)

$ 49.68

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6.03ctw Orange Hessonite Garnet, Emerald Cut, VS

6.03ctw Orange Hessonite Garnet, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 132.13

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14.78ct Multicolor Cinnabar, Baguette, Opaque

14.78ct Multicolor Cinnabar, Baguette, Opaque

20 x 15 mm (calibrated)

$ 17.30

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0.42ct Orange Sphalerite, Round, SI

0.42ct Orange Sphalerite, Round, SI

4.3 mm

$ 20.92

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0.81ctw Green Peridot, Pear Shape, VVS-VS

0.81ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 13.31

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87.70ct Violet Charoite, Cushion, Opaque
Charoite Product Video (344684)

87.70ct Violet Charoite, Cushion, Opaque

31 x 27.3 mm

$ 144.13

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4.56ct Pink Strawberry Quartz, Oval, Translucent

4.56ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 54.50

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1.59ct Pink Tourmaline, Oval, VS

1.59ct Pink Tourmaline, Oval, VS

7.6 x 6.4 mm

$ 237.55

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0.53ct Yellow Citrine, Marquise, VVS

0.53ct Yellow Citrine, Marquise, VVS

8 x 4 mm (calibrated)

$ 3.69

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32.54ct Multicolor Jasper, Oval, Opaque

32.54ct Multicolor Jasper, Oval, Opaque

31.8 x 21.2 mm

$ 26.03

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7.29ct Violet Amethyst, Pear Shape, VVS-VS

7.29ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 55.91

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14.84ctw Black Spinel, Round, Opaque

14.84ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 48.77

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18.15ct Multicolor Quartz With Marcasite, Trillion, Transparent

18.15ct Multicolor Quartz With Marcasite, Trillion, Transparent

27.1 x 17.9 mm

$ 119.31

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0.76ct Yellow Citrine, Heart, VVS-VS

0.76ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 5.30

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0.90ct Violet Spinel, Cushion, VS

0.90ct Violet Spinel, Cushion, VS

6.5 x 5.6 mm

$ 45.23

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2.08ct Orange Hessonite Garnet, Oval, VS

2.08ct Orange Hessonite Garnet, Oval, VS

9.3 x 7.6 mm

$ 36.30

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34.59ct Green Aventurine, Oval, Translucent

34.59ct Green Aventurine, Oval, Translucent

34.1 x 20.3 mm

$ 28.71

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1.73ct Yellow Citrine, Flower Cut, Transparent

1.73ct Yellow Citrine, Flower Cut, Transparent

7.6 x 7.6 mm

$ 13.26

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1.73ct Orange Hessonite Garnet, Oval, VS

1.73ct Orange Hessonite Garnet, Oval, VS

7.9 x 6.6 mm

$ 26.44

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1.14ct Yellow Chrysoberyl, Oval, VS
Chrysoberyl Product Video (366298)

1.14ct Yellow Chrysoberyl, Oval, VS

7.8 x 5.6 mm

$ 132.92

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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

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
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

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate
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