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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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1.10ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 9.86

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2.43ctw White Rainbow Moonstone, Oval, Transparent

7 x 6 mm

$ 47.61

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25.90ct Bi-Color Ametrine, Pear Shape, VVS-VS

22.8 x 18.3 mm

$ 180.57

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34.50ct Multicolor Jasper, Cushion, Opaque

26 x 24.6 mm

$ 16.63

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20.47ctw Multicolor Fossil Coral, Oval, Opaque

22.8 x 14.3 mm

$ 25.56

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8.13ct White Quartz Cat'S Eye, Round, Transparent

13 mm (calibrated)

$ 28.85

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0.71ct Green Tsavorite Garnet, Oval, VS-SI

7 x 5 mm (calibrated)

$ 282.86

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25.72ct Multicolor Jasper, Fancy, Translucent

42.3 x 18.8 mm

$ 20.29

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12.98ctw Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 71.11

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4.99ct Orange Moonstone, Oval, Translucent

12 x 8 mm (calibrated)

$ 10.54

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3.14ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 24.09

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3.53ct Violet Amethyst, Round, VVS-VS

10 mm (calibrated)

$ 27.07

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2.12ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 4.9 mm

$ 18.58

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2.57ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 17.92

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1.43ct Orange Zircon, Pear Shape, VVS

8 x 6 mm (calibrated)

$ 34.80

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5.06ct Multicolor Agate, Sphere / Ball, Opaque

9 mm (calibrated)

$ 4.03

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22.91ct Gray Hematite, Heart, Opaque

20.3 x 19.1 mm

$ 50.20

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0.20ctw Blue Iolite, Square, VS

2.7 x 2.7 mm

$ 7.97

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2.76ct Yellow Citrine, Pear Shape, VS

10.6 x 7.6 mm

$ 21.17

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2.56ct Orange Hessonite Garnet, Oval, VS-SI

9.2 x 7.6 mm

$ 45.97

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0.64ct Yellow Citrine, Trillion, VS-SI

6 x 6 mm (calibrated)

$ 5.31

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1.92ct Yellow Citrine, Oval, VVS-VS

10.5 x 7.6 mm

$ 14.72

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0.91ct Blue Kyanite, Round, VS

5.2 mm

$ 15.11

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21.00ct Multicolor Quartz With Marcasite, Oval, Transparent

22.8 x 16.2 mm

$ 138.05

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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 -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
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Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
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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
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Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
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Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
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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
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