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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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1.80ctw Red Pyrope Garnet, Heart, VVS-VS

6.1 x 6.3 mm

$ 13.80

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6.87ct Pink Rose Quartz, Round, Transparent

11 mm (calibrated)

$ 37.64

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9.84ct Green Cat'S Eye Opal, Oval, Opaque

18.2 x 15.4 mm

$ 24.50

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14.96ct White Agate, Oval, Opaque

20 x 15 mm (calibrated)

$ 23.70

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4.12ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 22.57

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0.07ctw Black Diamond, Round, Opaque

1.9 mm (calibrated)

$ 20.34

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2.78ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 45.68

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0.73ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.7 x 5.2 mm

$ 27.12

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0.45ct Green Tourmaline, Baguette, VVS-VS

8.3 x 2.8 mm

$ 15.69

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5.04ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 38.65

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5.85ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 8.75

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0.90ctw Blue Kyanite, Round, VS-SI

4.3 mm

$ 22.41

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4.36ctw White Topaz, Square, VVS-VS

4 x 4 mm (calibrated)

$ 33.43

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5.56ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 41.70

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1.83ct Multicolor Spectrolite, Round, Opaque

8.5 mm (calibrated)

$ 6.84

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2.35ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 18.03

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11.77ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 21.92

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2.69ct Green Tourmaline, Emerald Cut, VS

11.3 x 6 mm

$ 133.96

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1.16ctw Green Peridot, Oval, Transparent

6 x 4.2 mm

$ 20.80

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0.63ct Green Tourmaline, Round, Transparent

5 mm (calibrated)

$ 25.10

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0.98ct Yellow Beryl, Oval, VVS

8 x 6 mm (calibrated)

$ 24.40

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0.61ct Yellow Color-Change Diaspore, Oval, VS

6.7 x 4.8 mm

$ 30.08

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0.86ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 5.99

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5.48ct Multicolor Labradorite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 12.12

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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

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate
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