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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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7.67ct Pink Morganite, Oval, Translucent

15.9 x 10.2 mm

$ 76.39

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0.69ct Yellow Citrine, Pear Shape, VS

7 x 5 mm (calibrated)

$ 3.44

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6.69ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 36.65

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1.53ct Yellow Citrine, Oval, VS

9 x 7 mm (calibrated)

$ 11.74

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8.72ct Multicolor Opal, Pear Shape, Transparent

22.3 x 16.5 mm

$ 217.13

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1.07ct Green Sphene, Oval, VS

8 x 5 mm (calibrated)

$ 50.41

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4.14ctw Red Pyrope Garnet, Marquise, VVS-VS

12.2 x 6.1 mm

$ 36.29

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1.64ct Red Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 28.10

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4.04ctw Yellow Sillimanite, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 154.92

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4.27ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 25.50

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0.74ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

5.6 x 5.2 mm

$ 19.63

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6.89ct Green Prehnite, Flower Cut, Transparent/Translucent

11 x 11 mm (calibrated)

$ 18.87

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1.77ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7.4 x 5.9 mm

$ 26.33

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11.57ct White Agate, Oval, Opaque

21.6 x 13.8 mm

$ 18.33

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4.55ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 27.17

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18.04ct Brown Star Sunstone, Oval, Opaque

18.2 x 14.8 mm

$ 149.73

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14.52ct Green Amazonite, Cushion, Opaque

20.3 x 11.6 mm

$ 14.75

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0.90ct Green Tourmaline, Emerald Cut, VVS-VS

9.8 x 3.4 mm

$ 22.41

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2.34ct Orange Hessonite Garnet, Cushion, SI

8 x 8 mm (calibrated)

$ 51.28

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1.39ct Green Tourmaline, Emerald Cut, VVS

13.9 x 3.8 mm

$ 26.73

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3.22ctw Yellow Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 16.04

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0.55ct Green Tourmaline, Baguette, VS

5.8 x 3.5 mm

$ 19.17

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10.20ct Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 22.55

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32.63ct Green Malachite, Oval, Opaque

29.3 x 19.2 mm

$ 32.50

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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

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

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
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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

Very pleasant

Posted By Varun in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

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
Source: Bizrate
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