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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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3.49ctw Red Pyrope Garnet, Marquise, VVS

12.1 x 6 mm

$ 30.59

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0.88ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 12.27

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0.98ct Green Sphene, Oval, Transparent

6.2 x 5.1 mm

$ 4.88

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0.55ct Green Tourmaline, Baguette, VVS

14.7 x 2.4 mm

$ 19.17

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2.59ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7.3 mm

$ 51.59

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6.81ct Violet Amethyst, Heart, Transparent

13.2 x 11.9 mm

$ 33.91

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14.27ct Red Star Garnet, Oval, Opaque

16 x 12 mm (calibrated)

$ 14.08

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0.42ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.34

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3.68ct Multicolor Fire Agate, Trillion, Translucent

14 x 9 mm (calibrated)

$ 31.66

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40.97ct Pink Rose Quartz, Oval, Transparent/Translucent

25.5 x 22.1 mm

$ 53.87

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2.62ctw Green Prehnite, Oval, Transparent

7.8 x 6.3 mm

$ 14.35

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7.90ct Brown Star Moonstone, Oval, Translucent

14 x 10 mm (calibrated)

$ 34.62

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1.36ctw Green Peridot, Oval, VS

6 x 4 mm (calibrated)

$ 24.39

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10.42ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 10.38

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1.87ct Multicolor Opal, Oval, Translucent

11.6 x 8.3 mm

$ 81.95

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0.36ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 2.87

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4.09ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 44.94

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0.64ct Green Tourmaline, Baguette, VVS

12.8 x 2.5 mm

$ 22.31

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1.44ct Orange Sunstone, Oval, Translucent

8.2 x 6.3 mm

$ 10.04

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1.21ct Violet Amethyst, Square, VVS-VS

6 x 6 mm (calibrated)

$ 9.64

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1.47ct Yellow Tourmaline, Oval, VS

7.2 x 6.2 mm

$ 80.53

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10.44ct Black Tourmaline, Oval, Opaque

14.6 x 12.2 mm

$ 51.99

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58.94ct Blue Larimar, Cushion, Opaque

30.8 x 29.3 mm

$ 645.76

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30.33ct Green Maw-Sit-Sit, Baguette, Opaque

18.3 x 16 mm

$ 99.69

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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

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
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Overall Rating -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
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Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
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Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

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Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
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Overall Rating -> 10 star ratings

hassle free experience.

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