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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
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4.64ctw Red Pyrope Garnet, Marquise, VS

10 x 5.1 mm

$ 40.67

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23.35ct Brown Tiger'S Eye, Fancy, Opaque

34.7 x 9.6 mm

$ 2.33

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11.32ct Violet Amethyst, Cushion, VVS

15 x 15 mm (calibrated)

$ 90.20

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27.07ct Brown Tiger'S Eye Matrix, Cushion, Opaque

20.1 x 18.1 mm

$ 26.96

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2.93ct Orange Pyrope Garnet, Fancy, Translucent

12 x 8.7 mm

$ 7.35

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4.34ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 23.77

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2.60ct Red Almandine Garnet, Oval, VVS

10 x 8 mm (calibrated)

$ 97.11

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4.66ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

15.2 x 9 mm

$ 13.93

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12.73ct Multicolor Moss Agate, Fancy, Translucent

26.6 x 14.9 mm

$ 10.57

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12.94ct Multicolor Agate, Oval, Opaque

17.2 x 15.1 mm

$ 10.31

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2.91ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 15.94

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2.63ct Yellow Sphene, Oval, Transparent

8.7 x 7.5 mm

$ 14.41

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3.88ctw Red Malaya Garnet, Round, VS

5.3 mm

$ 153.04

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50.68ct Multicolor Jasper, Baguette, Opaque

30 x 22 mm (calibrated)

$ 31.09

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2.73ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.03

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0.90ct Green Tourmaline, Emerald Cut, VS

14.9 x 3.2 mm

$ 23.66

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0.41ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.27

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1.31ct Red Pyrope Garnet, Fancy, VS

8.8 x 3.4 mm

$ 13.07

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0.47ct Yellow Citrine, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 3.28

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1.51ct Green Tourmaline, Emerald Cut, VVS-VS

7.5 x 5.8 mm

$ 75.20

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0.90ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 6.91

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1.30ct Green Sphene, Oval, Transparent

7.1 x 5.6 mm

$ 6.47

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2.23ct Green Prehnite, Oval, Transparent/Translucent

8.3 x 6.6 mm

$ 6.83

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11.04ctw Violet Amethyst, Round, Transparent

11 mm (calibrated)

$ 54.98

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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 am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 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

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

love the site, the experience and the products.

Posted By Ckingpots in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate
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