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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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3.61ctw Multicolor Labradorite, Round, Translucent

3.61ctw Multicolor Labradorite, Round, Translucent

7 mm (calibrated)

$ 7.77

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1.74ctw Yellow Morganite, Pear Shape, VS

1.74ctw Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 95.32

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1.04ct Orange Zircon, Oval, VVS-VS
Zircon Product Video (742610)

1.04ct Orange Zircon, Oval, VVS-VS

5.9 x 4.9 mm

$ 12.96

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2.77ct Pink Strawberry Quartz, Oval, Transparent

2.77ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 20.58

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1.63ct Orange Moonstone, Trillion, Translucent

1.63ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 3.25

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0.50ct Green Cat'S Eye Alexandrite, Oval, Transparent

0.50ct Green Cat'S Eye Alexandrite, Oval, Transparent

5.8 x 4.3 mm

$ 103.75

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3.48ctw White Rainbow Moonstone, Oval, Transparent

3.48ctw White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 114.41

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12.20ctw Black Spinel, Oval, Opaque

12.20ctw Black Spinel, Oval, Opaque

14 x 10 mm (calibrated)

$ 46.78

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1.41ct Orange Sunstone, Oval, Translucent

1.41ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 23.36

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2.69ctw Gray Sillimanite Cat'S Eye, Oval, Transparent

2.69ctw Gray Sillimanite Cat'S Eye, Oval, Transparent

7.3 x 5.4 mm

$ 8.50

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11.38ct Yellow Apatite, Oval, VS
Apatite Product Video (366225)

11.38ct Yellow Apatite, Oval, VS

14 x 12 mm (calibrated)

$ 745.00

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2.16ctw Orange Hessonite Garnet, Round, VS

2.16ctw Orange Hessonite Garnet, Round, VS

6 mm (calibrated)

$ 33.28

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16.74ct White Rainbow Moonstone, Pear Shape, Transparent

16.74ct White Rainbow Moonstone, Pear Shape, Transparent

21.3 x 15.6 mm

$ 250.10

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27.96ctw Multicolor Jasper, Oval, Opaque

27.96ctw Multicolor Jasper, Oval, Opaque

26.5 x 15.4 mm

$ 16.43

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 10.27

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30.69ct Multicolor Ruby-Zoisite, Flower Cut, Opaque

30.69ct Multicolor Ruby-Zoisite, Flower Cut, Opaque

25 x 18 mm (calibrated)

$ 36.37

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31.99ct Gray Hematite, Pear Shape, Opaque

31.99ct Gray Hematite, Pear Shape, Opaque

25.1 x 16.5 mm

$ 31.19

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1.62ct Orange Moonstone, Marquise, Translucent

1.62ct Orange Moonstone, Marquise, Translucent

10 x 5 mm (calibrated)

$ 3.23

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0.71ct Multicolor Labradorite, Marquise, Transparent

0.71ct Multicolor Labradorite, Marquise, Transparent

8 x 4 mm (calibrated)

$ 1.03

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4.91ct Blue Chalcedony, Cushion, Translucent

4.91ct Blue Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 18.33

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7.16ct Green Chrysoberyl Cat'S Eye, Oval, Opaque

7.16ct Green Chrysoberyl Cat'S Eye, Oval, Opaque

11 x 9 mm (calibrated)

$ 6,537.08

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0.66ct Green Peridot, Marquise, VS

0.66ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 10.52

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14.42ct Brown Spessartite Garnet, Flower Cut, Translucent

14.42ct Brown Spessartite Garnet, Flower Cut, Translucent

12.8 x 11.9 mm

$ 12.06

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5.43ct Violet Amethyst, Pear Shape, VS
Amethyst Product Video (475878)

5.43ct Violet Amethyst, Pear Shape, VS

15 x 10 mm (calibrated)

$ 41.64

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

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

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