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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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Yellow Untreated Gemstones
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1.44ct Multicolor Labradorite, Marquise, Translucent

10.2 x 5.3 mm

$ 3.19

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11.81ct Green Amazonite, Pear Shape, Opaque

16.9 x 16.5 mm

$ 12.00

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4.23ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 21.07

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20.32ct White Dendritic Agate, Fancy, Opaque

25 x 18 mm (calibrated)

$ 14.16

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0.79ctw Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 27.54

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3.11ctw Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 21.60

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40.09ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

33.2 x 21.3 mm

$ 17.97

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1.27ct Pink Strawberry Quartz, Oval, Translucent

7 x 5 mm (calibrated)

$ 6.34

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1.78ct Brown Kornerupine, Cushion, VS

8.9 x 6.5 mm

$ 147.74

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6.18ct Black Tourmaline, Emerald Cut, Opaque

17.3 x 6.7 mm

$ 30.78

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15.59ct Brown Moonstone, Fancy, Translucent

24.4 x 14.3 mm

$ 17.94

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21.49ct Green Serpentine, Oval, Translucent

25 x 18 mm (calibrated)

$ 46.02

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1.24ct Yellow Citrine, Pear Shape, VVS-VS

9 x 6 mm (calibrated)

$ 10.86

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0.80ctw Yellow Citrine, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 5.05

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30.85ctw Multicolor Coral, Cushion, Opaque

18.9 x 15.2 mm

$ 58.47

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1.86ctw Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 50.95

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0.20ctw White Diamond, Round, VVS-VS

2.9 mm (calibrated)

$ 363.37

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3.28ct Yellow Citrine, Cushion, VVS-VS

12.3 x 7.4 mm

$ 25.16

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4.33ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 33.21

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1.43ct Multicolor Opal, Oval, Transparent

11.2 x 8.5 mm

$ 35.61

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0.73ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.09

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3.23ct Yellow Sphene, Oval, Transparent

9.1 x 7.7 mm

$ 17.70

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1.41ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 28.09

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4.00ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 30.68

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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

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 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

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 -> 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 -> 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 -> 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
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