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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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Yellow Untreated Gemstones
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0.72ct Green Tourmaline, Emerald Cut, VS

6.7 x 4.1 mm

$ 35.86

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0.47ct Multicolor Labradorite, Pear Shape, Translucent

6 x 4 mm (calibrated)

$ 1.04

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2.79ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 24.42

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0.84ct Orange Sphalerite, Round, SI

5 mm (calibrated)

$ 41.83

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7.21ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 23.70

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4.87ct White Topaz, Oval, VS

11 x 9 mm (calibrated)

$ 26.68

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16.50ct Turquoise Amazonite, Oval, Translucent

23.9 x 17 mm

$ 19.71

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1.90ct Orange Hessonite Garnet, Oval, VS-SI

8.2 x 6.8 mm

$ 31.22

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1.19ct Yellow Citrine, Square, VS

6.5 x 6.5 mm

$ 7.82

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3.93ctw White Sillimanite Cat'S Eye, Oval, Translucent

7.1 x 4.7 mm

$ 15.59

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29.67ct Brown Tiger'S Eye, Fancy, Opaque

37.3 x 10.1 mm

$ 2.95

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8.14ct Brown Smoky Quartz, Round, VVS-VS

14 mm (calibrated)

$ 13.38

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21.18ct Green Prehnite, Flower Cut, Translucent

18.8 x 11.7 mm

$ 48.74

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19.19ct Bi-Color Ametrine, Oval, VVS

20 x 15 mm (calibrated)

$ 105.13

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4.24ctw Orange Zircon, Round, VVS-VS

6 mm (calibrated)

$ 101.13

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11.69ct White Rainbow Moonstone, Pear Shape, Translucent

19.5 x 12.3 mm

$ 81.51

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4.42ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 29.05

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0.94ctw Violet Amethyst, Square, VS

4.7 x 4.6 mm

$ 7.49

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4.51ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 24.71

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1.44ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 27.49

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1.76ctw Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 24.54

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0.47ct Multicolor Labradorite, Pear Shape, Translucent

6 x 4 mm (calibrated)

$ 1.04

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1.02ct Yellow Citrine, Trillion, VS

7 x 7 mm (calibrated)

$ 6.37

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3.38ctw Orange Sunstone, Oval, Translucent

7 x 5 mm (calibrated)

$ 19.37

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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

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate
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