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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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0.56ct Red Pyrope Garnet, Heart, VS

0.56ct Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 13.94

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21.79ct Green Bloodstone, Oval, Opaque

21.79ct Green Bloodstone, Oval, Opaque

21.7 x 16.1 mm

$ 32.56

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0.75ct Green Peridot, Heart, VS

0.75ct Green Peridot, Heart, VS

6 x 6 mm (calibrated)

$ 5.60

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3.12ctw Red Rhodolite Garnet, Square, VS

3.12ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 27.31

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3.05ctw White Topaz, Cushion, VVS-VS

3.05ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 16.72

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7.84ctw Violet Amethyst, Oval, Transparent

7.84ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 42.94

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2.71ct Red Almandine Garnet, Pear Shape, VS

2.71ct Red Almandine Garnet, Pear Shape, VS

12 x 8 mm (calibrated)

$ 22.49

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0.49ct Yellow Citrine, Marquise, VVS-VS

0.49ct Yellow Citrine, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 3.42

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1.55ct Green Tourmaline, Emerald Cut, VVS-VS

1.55ct Green Tourmaline, Emerald Cut, VVS-VS

17.2 x 3.3 mm

$ 50.95

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6.50ct Violet Amethyst, Marquise, VS

6.50ct Violet Amethyst, Marquise, VS

18.1 x 10.1 mm

$ 49.85

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4.77ctw Multicolor Labradorite, Marquise, Translucent

4.77ctw Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 10.55

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13.25ct Green Uvarovite Garnet Drusy, Oval, Opaque

13.25ct Green Uvarovite Garnet Drusy, Oval, Opaque

20.8 x 10.2 mm

$ 19.80

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4.86ct White Topaz, Oval, VS

4.86ct White Topaz, Oval, VS

11 x 9 mm (calibrated)

$ 24.20

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0.45ctw Blue Kyanite, Round, VS-SI

0.45ctw Blue Kyanite, Round, VS-SI

3.7 mm

$ 11.21

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8.63ct Green Prehnite, Fancy, Transparent

8.63ct Green Prehnite, Fancy, Transparent

16 x 12 mm (calibrated)

$ 12.01

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0.07ctw Black Diamond, Round, Opaque

0.07ctw Black Diamond, Round, Opaque

2 mm (calibrated)

$ 20.34

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1.20ct Yellow Color-Change Diaspore, Emerald Cut, VVS

1.20ct Yellow Color-Change Diaspore, Emerald Cut, VVS

9.7 x 3.8 mm

$ 63.35

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2.66ctw Green Prehnite, Oval, Transparent

2.66ctw Green Prehnite, Oval, Transparent

8.3 x 6.3 mm

$ 14.57

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2.71ct Orange Hessonite Garnet, Oval, VS

2.71ct Orange Hessonite Garnet, Oval, VS

9.5 x 8 mm

$ 46.88

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27.03ctw Black Spinel, Fancy, Opaque

27.03ctw Black Spinel, Fancy, Opaque

18.2 x 12 mm

$ 88.84

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36.17ct Multicolor Rainbow Moonstone, Fancy, Opaque

36.17ct Multicolor Rainbow Moonstone, Fancy, Opaque

40 x 10.6 mm

$ 3.60

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1.28ct Green Peridot, Oval, VS

1.28ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 11.47

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11.53ct Green Malachite, Baguette, Opaque

11.53ct Green Malachite, Baguette, Opaque

11.6 x 10.7 mm

$ 13.78

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0.50ct Green Chrome Diopside, Oval, VVS-VS

0.50ct Green Chrome Diopside, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 12.45

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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 -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The website was very easy to use.

Posted By Garnet in January, 2026
Source: Bizrate
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