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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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3.35ctw Yellow Citrine, Emerald Cut, VVS-VS

3.35ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 23.36

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6.06ct Green Prehnite, Fancy, Transparent

6.06ct Green Prehnite, Fancy, Transparent

15.2 x 10.8 mm

$ 9.89

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2.08ct Orange Hessonite Garnet, Cushion, VS-SI

2.08ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 33.71

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0.78ct Yellow Citrine, Heart, VVS-VS

0.78ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 6.22

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0.49ct Violet Amethyst, Emerald Cut, VS

0.49ct Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 2.85

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1.89ctw White Sillimanite Cat'S Eye, Oval, Transparent

1.89ctw White Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 6.22

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2.23ct Green Sphene, Oval, Transparent

2.23ct Green Sphene, Oval, Transparent

7.8 x 7.2 mm

$ 11.11

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1.86ct Yellow Beryl, Trillion, VVS

1.86ct Yellow Beryl, Trillion, VVS

9 x 9 mm (calibrated)

$ 44.46

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5.01ct Yellow Moonstone, Oval, Translucent

5.01ct Yellow Moonstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 10.03

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2.34ct Green Tourmaline, Emerald Cut, VVS-VS

2.34ct Green Tourmaline, Emerald Cut, VVS-VS

16.2 x 4.1 mm

$ 64.09

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9.62ct Multicolor Labradorite, Pear Shape, Translucent

9.62ct Multicolor Labradorite, Pear Shape, Translucent

17 x 12 mm

$ 21.27

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1.31ct Green Tourmaline, Oval, Transparent

1.31ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 23.91

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5.56ct Multicolor Agate, Oval, Opaque

5.56ct Multicolor Agate, Oval, Opaque

10.7 x 10.5 mm

$ 4.43

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40.10ct Violet Charoite, Baguette, Opaque

40.10ct Violet Charoite, Baguette, Opaque

24.6 x 20.5 mm

$ 54.92

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1.27ct Yellow Color-Change Diaspore, Baguette, VVS-VS

1.27ct Yellow Color-Change Diaspore, Baguette, VVS-VS

8.8 x 4.6 mm

$ 60.85

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4.32ct Brown Smoky Quartz, Round, VVS-VS

4.32ct Brown Smoky Quartz, Round, VVS-VS

10.5 mm

$ 7.10

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43.56ct Multicolor Rainbow Pyrite, Fancy, Opaque

43.56ct Multicolor Rainbow Pyrite, Fancy, Opaque

27 x 20 mm (calibrated)

$ 112.81

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2.22ct Orange Moonstone, Square, Translucent

2.22ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 4.44

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0.92ct Orange Hessonite Garnet, Emerald Cut, VS

0.92ct Orange Hessonite Garnet, Emerald Cut, VS

5.3 x 5.3 mm

$ 16.49

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3.51ctw Pink Strawberry Quartz, Round, Transparent

3.51ctw Pink Strawberry Quartz, Round, Transparent

8 mm (calibrated)

$ 53.83

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16.62ct Multicolor Opal, Pear Shape, Opaque

16.62ct Multicolor Opal, Pear Shape, Opaque

17.7 x 15.3 mm

$ 413.84

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0.59ct Yellow Beryl, Pear Shape, VS

0.59ct Yellow Beryl, Pear Shape, VS

8 x 5 mm (calibrated)

$ 14.10

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21.52ct White Rainbow Moonstone, Oval, Translucent

21.52ct White Rainbow Moonstone, Oval, Translucent

25.4 x 10.9 mm

$ 21.43

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1.92ct Violet Amethyst, Marquise, VS

1.92ct Violet Amethyst, Marquise, VS

12 x 6 mm

$ 14.72

View Gem
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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 and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate
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