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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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Bi-color Untreated Gemstones
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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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30.77ct White Rainbow Moonstone, Pear Shape, Translucent

30.77ct White Rainbow Moonstone, Pear Shape, Translucent

27 x 20 mm (calibrated)

$ 214.53

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4.61ctw Red Almandine Garnet, Oval, VVS-VS

4.61ctw Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 172.18

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23.47ctw Multicolor Fossil Coral, Oval, Opaque

23.47ctw Multicolor Fossil Coral, Oval, Opaque

20.4 x 11.9 mm

$ 30.34

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31.19ct Multicolor Jasper, Fancy, Opaque

31.19ct Multicolor Jasper, Fancy, Opaque

27 x 20 mm (calibrated)

$ 34.17

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3.43ct Violet Amethyst, Pear Shape, VS

3.43ct Violet Amethyst, Pear Shape, VS

13.7 x 9.5 mm

$ 24.91

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1.02ctw Violet Amethyst, Marquise, VVS-VS

1.02ctw Violet Amethyst, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 6.77

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0.38ct Orange Sphalerite, Trillion, VS-SI

0.38ct Orange Sphalerite, Trillion, VS-SI

4.3 x 4.1 mm

$ 18.92

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31.52ct Brown Tiger'S Eye Matrix, Pear Shape, Opaque

31.52ct Brown Tiger'S Eye Matrix, Pear Shape, Opaque

29.4 x 23.8 mm

$ 17.89

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4.95ct Green Jadeite, Oval, Opaque
Jadeite Product Video (643705)

4.95ct Green Jadeite, Oval, Opaque

12 x 10 mm (calibrated)

$ 37.37

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0.93ct Red Rhodolite Garnet, Emerald Cut, VVS-VS

0.93ct Red Rhodolite Garnet, Emerald Cut, VVS-VS

5.5 x 4.8 mm

$ 41.85

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1.27ct Purple Spinel, Cushion, VS

1.27ct Purple Spinel, Cushion, VS

6.9 x 5.9 mm

$ 89.49

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2.19ct Orange Moonstone, Cushion, Translucent

2.19ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 4.37

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7.50ct Green Chrysoprase, Oval, Opaque
Chrysoprase Product Video (750219)

7.50ct Green Chrysoprase, Oval, Opaque

12.4 x 12 mm

$ 93.38

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4.06ct Pink Strawberry Quartz, Oval, Translucent

4.06ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 48.52

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7.48ct Violet Amethyst, Oval, Transparent

7.48ct Violet Amethyst, Oval, Transparent

15.9 x 10.1 mm

$ 37.25

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2.77ct Pink Tourmaline, Emerald Cut, VVS-VS

2.77ct Pink Tourmaline, Emerald Cut, VVS-VS

9.5 x 6.3 mm

$ 209.40

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1.05ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.05ct Yellow Color-Change Diaspore, Cushion, VVS-VS

6.7 x 6 mm

$ 54.95

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25.72ctw Black Spinel, Baguette, Opaque
Spinel Product Video (372535)

25.72ctw Black Spinel, Baguette, Opaque

17.7 x 8.3 mm

$ 202.33

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1.09ct Yellow Citrine, Round, VS

1.09ct Yellow Citrine, Round, VS

7 mm (calibrated)

$ 7.24

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4.49ct Violet Amethyst, Pear Shape, VVS-VS

4.49ct Violet Amethyst, Pear Shape, VVS-VS

15 x 10 mm (calibrated)

$ 34.43

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0.56ct White Rainbow Moonstone, Baguette, Transparent

0.56ct White Rainbow Moonstone, Baguette, Transparent

6.1 x 4.1 mm

$ 19.52

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4.57ctw Orange Hessonite Garnet, Oval, VS

4.57ctw Orange Hessonite Garnet, Oval, VS

8.6 x 7.2 mm

$ 76.21

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1.62ct Black Star Diopside, Oval, Opaque

1.62ct Black Star Diopside, Oval, Opaque

8 x 6 mm (calibrated)

$ 8.07

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1.19ct Yellow Citrine, Cushion, VVS

1.19ct Yellow Citrine, Cushion, VVS

8 x 6 mm (calibrated)

$ 8.89

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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 was able to find what I wanted very easily!

Posted By Lenny in January, 2026
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Overall Rating -> 10 star ratings

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
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Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
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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

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
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Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
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