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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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2.13ct Bi-Color Ametrine, Emerald Cut, VVS

9 x 7 mm (calibrated)

$ 22.34

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3.52ct Violet Amethyst, Briolette, VS

11.4 x 7.5 mm

$ 15.43

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0.63ct Green Tourmaline, Emerald Cut, VS

10.1 x 3 mm

$ 17.19

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0.86ct Orange Sunstone, Oval, Translucent

8 x 5 mm (calibrated)

$ 5.99

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11.34ctw Green Prehnite, Oval, Transparent

6.8 x 5.3 mm

$ 124.24

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48.40ct Violet Charoite, Fancy, Opaque

35.2 x 23.9 mm

$ 79.54

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3.23ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 22.52

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0.83ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 11.57

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0.54ct White Rainbow Moonstone, Baguette, Transparent

6 x 4 mm (calibrated)

$ 18.82

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46.12ctw White Howlite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 23.89

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1.19ct Yellow Color-Change Diaspore, Emerald Cut, VS

8.7 x 4.3 mm

$ 63.99

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112.10ct White Dendritic Agate, Round, Opaque

51.3 mm

$ 55.83

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3.96ct Multicolor Pietersite, Trillion, Opaque

13.1 x 12.3 mm

$ 9.58

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2.47ctw Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 15.10

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3.02ct Pink Tourmaline, Pear Shape, VS

11.7 x 9.4 mm

$ 360.95

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1.67ct Yellow Golden Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 40.25

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5.23ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 40.11

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5.23ct Yellow Citrine, Oval, VVS

13.5 x 10 mm

$ 40.11

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0.72ct Pink Tourmaline, Round, Transparent

5.3 mm

$ 28.68

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42.63ct Yellow Obsidian, Oval, Opaque

34.2 x 25 mm

$ 46.70

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1.47ct Green Tourmaline, Emerald Cut, VVS

21.2 x 3.3 mm

$ 36.60

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1.33ct Green Tourmaline, Oval, VS-SI

7.2 x 6.4 mm

$ 154.55

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1.82ctw Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 25.38

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1.50ct Red Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 25.71

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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

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate
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