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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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0.82ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.72

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0.88ct Pink Tourmaline, Oval, Transparent

6.5 x 5.8 mm

$ 15.08

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9.70ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 9.66

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0.47ct Green Chrome Diopside, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 11.70

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0.97ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 20.19

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0.72ct Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 3.59

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48.72ct Pink Rose Quartz, Oval, Transparent

23.9 x 21.4 mm

$ 72.06

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0.45ct Blue Kyanite, Round, VS-SI

4.3 mm

$ 11.21

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10.94ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 13.55

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2.65ctw Orange Hessonite Garnet, Cushion, VS

6 x 6 mm (calibrated)

$ 44.18

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1.19ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7.4 x 5.1 mm

$ 17.70

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2.16ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 80.68

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5.75ct Multicolor Ruby In Fuchsite, Marquise, Translucent

23.4 x 11.5 mm

$ 42.97

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15.66ct Multicolor Quartz With Marcasite, Fancy, Translucent

23.5 x 14 mm

$ 85.79

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2.93ctw Red Pyrope Garnet, Marquise, VVS-VS

11.8 x 5.9 mm

$ 32.20

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2.50ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 4.98

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1.79ctw Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 28.53

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2.78ct Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 2.77

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4.83ct Brown Smoky Quartz, Round, VVS-VS

12 mm (calibrated)

$ 15.88

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0.99ctw Green Peridot, Oval, Transparent

6 x 4 mm (calibrated)

$ 17.75

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18.54ctw Multicolor Labradorite, Round, Translucent

13 mm (calibrated)

$ 45.06

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1.54ct Pink Tourmaline, Emerald Cut, VS

7.9 x 5.4 mm

$ 111.35

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1.46ct Pink Morganite, Pear Shape, VVS-VS

9.3 x 7.4 mm

$ 63.98

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0.52ct Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 12.95

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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

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
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Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
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Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate
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