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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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Multicolor Untreated Gemstones
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Yellow Untreated Gemstones
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13.07ct Brown Smoky Quartz, Flower Cut, Transparent

15 x 15 mm (calibrated)

$ 35.81

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26.36ctw Multicolor Fossil Coral, Oval, Opaque

19.9 x 14.2 mm

$ 30.03

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38.34ct Gray Hematite, Round, Opaque

21.6 mm

$ 25.20

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0.09ctw White Diamond, Round, VVS

2.2 mm (calibrated)

$ 208.54

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3.07ctw Yellow Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 16.82

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1.98ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 73.95

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5.65ctw Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 7.77

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60.94ctw Multicolor Labradorite, Round, Translucent

25.3 mm

$ 134.75

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2.51ct Orange Hessonite Garnet, Oval, VS-SI

9.2 x 7.6 mm

$ 40.40

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15.20ct White Dendritic Agate, Pear Shape, Opaque

21.3 x 15.6 mm

$ 10.60

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0.63ct Orange Citrine, Oval, VS

7 x 5 mm (calibrated)

$ 6.27

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2.84ctw Green Tsavorite Garnet, Round, VS-SI

2.4 mm (calibrated)

$ 220.57

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0.74ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

5.6 x 5.2 mm

$ 19.63

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0.65ct Pink Tourmaline, Oval, Transparent

6.1 x 4.8 mm

$ 25.90

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0.97ct Orange Sphalerite, Round, VS-SI

5.5 mm (calibrated)

$ 48.31

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0.17ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 303.91

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4.67ct Orange Sunstone, Round, Translucent

11 mm (calibrated)

$ 28.49

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5.95ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 9.88

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18.89ct Black Tourmaline, Emerald Cut, Opaque

17.1 x 13.6 mm

$ 94.07

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1.97ctw Purple Rhodolite Garnet, Oval, VS

5.1 x 3.2 mm

$ 32.05

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0.57ctw Blue Kyanite, Round, VS-SI

3.7 mm

$ 10.22

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3.91ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 21.42

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2.85ctw Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 19.80

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0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 23.90

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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

I was able to find what I've been looking for.

Posted By Tree Dog in April, 2026
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Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
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Overall Rating -> 10 star ratings

The stones are very nice.

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

Good. I ts very user friendly.

Posted By Shalini in June, 2025
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Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
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