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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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12.54ct Green Bloodstone, Oval, Opaque

16 x 12 mm (calibrated)

$ 24.98

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12.29ctw Multicolor Labradorite, Baguette, Transparent

11 x 9 mm (calibrated)

$ 15.75

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0.70ct Pink Morganite, Pear Shape, VVS-VS

7.4 x 5 mm

$ 42.18

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9.67ct Multicolor Coral, Pear Shape, Translucent

15.7 x 15 mm

$ 30.63

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0.67ct Multicolor Labradorite, Round, Translucent

5 mm (calibrated)

$ 1.63

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11.28ct Black Nuummite, Trillion, Opaque

23.9 x 16.1 mm

$ 49.06

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1.07ct Green Tourmaline, Emerald Cut, VVS-VS

15.2 x 3.2 mm

$ 35.17

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20.80ctw Multicolor Fossil Coral, Oval, Opaque

19.4 x 11.3 mm

$ 26.88

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2.54ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 19.48

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6.37ctw Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 34.90

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2.60ctw Yellow Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 19.94

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1.12ct Orange Hessonite Garnet, Baguette, SI

6.2 x 4.5 mm

$ 24.54

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1.19ct Green Sphene, Oval, Transparent

6.8 x 5.9 mm

$ 5.93

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9.37ct Black Tourmaline, Cushion, Opaque

14.4 x 11.5 mm

$ 33.32

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2.42ct Orange Hessonite Garnet, Emerald Cut, SI

8.2 x 6.3 mm

$ 45.38

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8.44ct Bi-Color Ametrine, Oval, VVS

15.4 x 11.3 mm

$ 55.48

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6.30ctw Brown Smoky Quartz, Oval, VS

11.5 x 9.1 mm

$ 27.61

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3.82ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 33.48

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2.98ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 20.77

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5.67ct Yellow Star Moonstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 24.85

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1.01ct Green Peridot, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 15.09

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0.61ctw Blue Kyanite, Round, VS

3.7 mm

$ 15.19

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2.38ct Orange Hessonite Garnet, Oval, VS-SI

8.9 x 7.4 mm

$ 47.41

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2.80ctw Green Tsavorite Garnet, Round, VS-SI

2.4 mm (calibrated)

$ 217.47

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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

Very good.

Posted By Tommy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate
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