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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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Yellow Untreated Gemstones
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4.03ct Yellow Citrine, Oval, VS

13 x 9 mm (calibrated)

$ 24.42

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10.53ct Green Amazonite, Pear Shape, Opaque

18.4 x 14.3 mm

$ 10.70

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1.53ctw Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 21.33

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0.74ct Pink Tourmaline, Round, Transparent

5.2 mm

$ 29.48

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2.52ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 41.42

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60.66ct Green Amazonite, Square, Opaque

24.2 x 24.1 mm

$ 35.24

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0.59ct Orange Zircon, Oval, VVS

5.1 x 4.2 mm

$ 8.81

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4.04ctw Green Prehnite, Oval, Transparent

8.1 x 7.1 mm

$ 25.98

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5.20ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 31.22

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1.43ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 11.40

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5.43ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 32.61

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2.94ct Yellow Rutile Quartz, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 7.92

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1.04ct Purple Spinel, Cushion, VS

6 x 5 mm

$ 103.58

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2.43ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.1 mm

$ 21.30

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2.52ctw Gray Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 7.96

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12.38ct Multicolor Cinnabar, Oval, Opaque

21.1 x 15 mm

$ 14.49

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4.05ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 29.42

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46.78ct Green Uvarovite Garnet Drusy, Fancy, Opaque

32.7 x 23.6 mm

$ 69.89

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3.26ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 17.86

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2.16ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5 mm

$ 18.93

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1.19ct Green Tourmaline, Emerald Cut, VVS

13.2 x 3.4 mm

$ 28.68

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0.65ct Orange Sphalerite, Round, SI

5 mm (calibrated)

$ 32.37

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2.69ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 14.74

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0.91ct Yellow Color-Change Diaspore, Emerald Cut, VS

6.3 x 4.3 mm

$ 28.97

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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

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk 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

love the site, the experience and the products.

Posted By Ckingpots in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate
Enlarged Gemstone Image