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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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6.28ct Green Prehnite, Fancy, Translucent

6.28ct Green Prehnite, Fancy, Translucent

15 x 10 mm (calibrated)

$ 10.32

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1.53ct Yellow Beryl, Oval, VVS

1.53ct Yellow Beryl, Oval, VVS

9 x 7 mm (calibrated)

$ 38.10

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2.31ct Yellow Citrine, Trillion, VVS-VS

2.31ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 12.50

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2.38ct Orange Hessonite Garnet, Cushion, VS-SI

2.38ct Orange Hessonite Garnet, Cushion, VS-SI

7.6 x 7.6 mm

$ 52.15

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26.36ct Multicolor Amethyst Geode Slice, Fancy, Transparent

26.36ct Multicolor Amethyst Geode Slice, Fancy, Transparent

30.5 x 18.9 mm

$ 28.10

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1.70ct Green Tourmaline, Emerald Cut, VVS

1.70ct Green Tourmaline, Emerald Cut, VVS

14.7 x 3.7 mm

$ 46.56

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23.01ct Gray Hematite, Baguette, Opaque

23.01ct Gray Hematite, Baguette, Opaque

19.7 x 16.7 mm

$ 22.44

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1.21ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

1.21ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

6.6 x 4.8 mm

$ 24.10

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1.48ct Pink Tourmaline, Emerald Cut, VVS-VS

1.48ct Pink Tourmaline, Emerald Cut, VVS-VS

7.6 x 5.2 mm

$ 107.02

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9.97ct Multicolor Pietersite, Pear Shape, Opaque

9.97ct Multicolor Pietersite, Pear Shape, Opaque

21.4 x 18.1 mm

$ 33.10

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18.83ct Bi-Color Ametrine, Oval, VVS-VS

18.83ct Bi-Color Ametrine, Oval, VVS-VS

22 x 13.9 mm

$ 93.77

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0.98ct Purple Rhodolite Garnet, Oval, VS

0.98ct Purple Rhodolite Garnet, Oval, VS

6.9 x 5.3 mm

$ 26.03

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2.75ct Green Sphene, Oval, Translucent

2.75ct Green Sphene, Oval, Translucent

8.9 x 7.6 mm

$ 16.48

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2.50ct Yellow Rutile Topaz, Heart, Transparent

2.50ct Yellow Rutile Topaz, Heart, Transparent

9.1 x 7.7 mm

$ 51.88

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1.95ct Orange Zircon, Pear Shape, VS

1.95ct Orange Zircon, Pear Shape, VS

8.4 x 6.4 mm

$ 53.42

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12.95ct Multicolor Agate, Oval, Opaque

12.95ct Multicolor Agate, Oval, Opaque

20.9 x 12.1 mm

$ 10.32

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2.33ctw Yellow Citrine, Pear Shape, VVS-VS

2.33ctw Yellow Citrine, Pear Shape, VVS-VS

9 x 6 mm (calibrated)

$ 15.32

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0.78ct Green Chrome Diopside, Oval, VS-SI

0.78ct Green Chrome Diopside, Oval, VS-SI

7 x 5 mm (calibrated)

$ 19.42

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6.38ct Multicolor Labradorite, Round, Translucent

6.38ct Multicolor Labradorite, Round, Translucent

14 mm (calibrated)

$ 13.73

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10.40ct Multicolor Coral, Pear Shape, Translucent

10.40ct Multicolor Coral, Pear Shape, Translucent

20 x 15 mm (calibrated)

$ 32.93

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4.75ct Yellow Citrine, Oval, VVS-VS

4.75ct Yellow Citrine, Oval, VVS-VS

12.7 x 9.5 mm

$ 36.44

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2.83ct Yellow Citrine, Oval, VVS-VS

2.83ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 15.50

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1.71ct Green Tourmaline, Emerald Cut, SI

1.71ct Green Tourmaline, Emerald Cut, SI

14.2 x 3.9 mm

$ 41.22

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3.30ct Yellow Apatite, Emerald Cut, VVS-VS

3.30ct Yellow Apatite, Emerald Cut, VVS-VS

9 x 9 mm (calibrated)

$ 169.93

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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

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

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
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

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

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
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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