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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
Untreated Gemstones Size
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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8.35ct White Dendritic Agate, Pear Shape, Opaque

19.5 x 9.6 mm

$ 16.63

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32.16ct Multicolor Jasper, Oval, Opaque

32.4 x 22.8 mm

$ 19.38

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21.17ct Pink Rose Quartz, Oval, Transparent

18 x 13 mm (calibrated)

$ 27.83

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1.14ct Pink Tourmaline, Emerald Cut, VVS-VS

7.5 x 4.7 mm

$ 86.19

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1.91ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 69.75

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35.76ct Purple Ruby-Zoisite, Flower Cut, Opaque

20.9 x 20.1 mm

$ 43.46

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24.65ct Green Aventurine, Pear Shape, Translucent

32.5 x 21.5 mm

$ 24.55

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10.09ct Green Jadeite, Oval, Translucent

18 x 13 mm (calibrated)

$ 33.17

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1.17ct Brown Kornerupine, Pear Shape, VS

9 x 6 mm (calibrated)

$ 53.41

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1.76ct Yellow Cat'S Eye Apatite, Oval, Translucent

7.5 x 6 mm

$ 10.89

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0.97ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

11.9 x 4.1 mm

$ 34.01

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13.46ct Multicolor Boulder Opal, Cushion, Opaque

14.7 x 12.1 mm

$ 73.74

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2.76ct Yellow Citrine, Baguette, VS

11.2 x 5.7 mm

$ 21.17

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0.07ct Black Diamond, Square, Opaque

2 x 2 mm (calibrated)

$ 34.86

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0.77ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 10.74

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1.60ct Multicolor Labradorite, Baguette, Transparent

8 x 6 mm (calibrated)

$ 3.50

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2.00ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 39.44

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10.23ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 20.06

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2.82ct Violet Amethyst, Oval, VVS

10.5 x 8.3 mm

$ 19.66

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0.53ct Green Chrome Diopside, Oval, VS

6 x 4 mm (calibrated)

$ 13.20

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0.59ct Purple Spinel, Cushion, VVS-VS

5.2 x 4.7 mm

$ 21.10

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5.31ct Pink Rose Quartz, Emerald Cut, Transparent

10.4 x 10.2 mm

$ 26.44

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2.54ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 5.06

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8.06ct Multicolor Agate, Oval, Opaque

14 x 12.8 mm

$ 6.42

View Gem
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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. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate

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
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate
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