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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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2.93ctw Green Peridot, Square, VS

2.93ctw Green Peridot, Square, VS

5 x 5 mm (calibrated)

$ 32.10

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2.74ct White Moonstone, Oval, Transparent

2.74ct White Moonstone, Oval, Transparent

10 x 8 mm (calibrated)

$ 24.01

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0.41ct Pink Spinel, Cushion, VVS-VS

0.41ct Pink Spinel, Cushion, VVS-VS

4.7 x 3.7 mm

$ 28.59

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0.66ct Yellow Zircon, Oval, VVS

0.66ct Yellow Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 16.43

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0.56ct Green Tourmaline, Emerald Cut, VVS-VS

0.56ct Green Tourmaline, Emerald Cut, VVS-VS

6 x 4 mm (calibrated)

$ 27.89

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1.14ctw Yellow Citrine, Pear Shape, VVS

1.14ctw Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 9.08

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1.77ctw Violet Amethyst, Heart, Transparent

1.77ctw Violet Amethyst, Heart, Transparent

6.3 x 6 mm

$ 13.58

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22.71ct Violet Lepidolite, Fancy, Opaque

22.71ct Violet Lepidolite, Fancy, Opaque

36.2 x 9.2 mm

$ 2.26

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1.44ct Green Tourmaline, Emerald Cut, VVS-VS

1.44ct Green Tourmaline, Emerald Cut, VVS-VS

20.7 x 3 mm

$ 48.60

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2.08ct Orange Hessonite Garnet, Oval, VVS-VS

2.08ct Orange Hessonite Garnet, Oval, VVS-VS

8.6 x 7 mm

$ 41.43

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1.02ct Orange Hessonite Garnet, Round, VVS-VS

1.02ct Orange Hessonite Garnet, Round, VVS-VS

5.5 mm (calibrated)

$ 15.59

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10.04ct Multicolor Rainbow Pyrite, Cushion, Opaque

10.04ct Multicolor Rainbow Pyrite, Cushion, Opaque

15 x 15 mm (calibrated)

$ 25.90

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2.40ct Multicolor Labradorite, Pear Shape, Translucent

2.40ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 5.31

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7.97ct Yellow Citrine, Briolette, VS

7.97ct Yellow Citrine, Briolette, VS

14.2 x 9.9 mm

$ 44.98

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1.67ct Orange Hessonite Garnet, Emerald Cut, VS

1.67ct Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 32.93

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4.01ctw Red Pyrope Garnet, Square, VVS-VS

4.01ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 27.95

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7.35ct Brown Tiger'S Eye, Baguette, Opaque

7.35ct Brown Tiger'S Eye, Baguette, Opaque

14.3 x 10.3 mm

$ 7.32

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1.24ct Pink Morganite, Round, VS

1.24ct Pink Morganite, Round, VS

7.5 mm (calibrated)

$ 95.10

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11.60ct Multicolor Agate, Oval, Opaque

11.60ct Multicolor Agate, Oval, Opaque

14 x 12 mm (calibrated)

$ 19.64

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1.40ct Purple Rhodolite Garnet, Emerald Cut, VVS-VS

1.40ct Purple Rhodolite Garnet, Emerald Cut, VVS-VS

5.6 x 5.2 mm

$ 52.29

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4.90ctw Orange Hessonite Garnet, Emerald Cut, VS

4.90ctw Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 107.37

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1.93ct Orange Hessonite Garnet, Oval, VS

1.93ct Orange Hessonite Garnet, Oval, VS

8.3 x 6.9 mm

$ 42.29

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1.43ct Orange Hessonite Garnet, Emerald Cut, VS

1.43ct Orange Hessonite Garnet, Emerald Cut, VS

5.9 x 5.8 mm

$ 28.20

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3.05ctw Violet Amethyst, Oval, VS

3.05ctw Violet Amethyst, Oval, VS

7 x 5 mm (calibrated)

$ 16.72

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

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

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

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I've been looking for.

Posted By Tree Dog in April, 2026
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

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate
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