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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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9.78ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 5.74

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19.76ct Green Maw-Sit-Sit, Baguette, Opaque

14.8 x 13.6 mm

$ 64.95

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3.95ctw Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 147.53

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32.43ct Multicolor Jasper, Pear Shape, Opaque

32.1 x 23 mm

$ 15.64

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0.82ct Yellow Morganite, Cushion, VS

5.8 x 5.7 mm

$ 49.41

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1.72ct Multicolor Opal, Oval, Transparent

10.9 x 7.2 mm

$ 42.83

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20.83ct Multicolor Jasper, Baguette, Opaque

22.8 x 16.2 mm

$ 45.65

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0.87ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 19.07

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13.26ct Multicolor Jasper, Oval, Opaque

21.1 x 15.9 mm

$ 29.05

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13.63ct Black Obsidian, Oval, Opaque

24.8 x 15.8 mm

$ 10.18

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3.58ct Multicolor Opal, Pear Shape, Translucent

14.5 x 10.4 mm

$ 89.14

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0.68ct Violet Spinel, Round, VS

5 mm (calibrated)

$ 15.52

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4.63ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 55.34

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3.43ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 9.40

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1.21ct Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 10.61

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1.27ct Yellow Citrine, Pear Shape, VVS

9 x 6 mm (calibrated)

$ 6.96

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3.65ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 16.68

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1.02ct Orange Zircon, Oval, VS

5.9 x 4.9 mm

$ 15.24

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0.59ct Brown Chocolate Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 17.63

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0.93ct Yellow Color-Change Diaspore, Emerald Cut, VVS

6.9 x 4.5 mm

$ 49.09

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37.38ct Multicolor Jasper, Pear Shape, Opaque

38.2 x 24.4 mm

$ 38.09

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4.15ct Violet Amethyst, Pear Shape, VVS

15 x 10 mm (calibrated)

$ 28.93

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74.15ctw Multicolor Rhodochrosite, Sphere / Ball, Opaque

15.8 mm

$ 162.48

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4.79ct Brown Tiger'S Eye, Oval, Opaque

12 x 10 mm (calibrated)

$ 4.77

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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

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

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

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
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Overall Rating -> 10 star ratings

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

Posted By Love It! in July, 2025
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Overall Rating -> 10 star ratings

Was a good experience.

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

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
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