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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
Untreated Gemstones Size
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Violet Untreated Gemstones
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Yellow Untreated Gemstones
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62.41ct Violet Charoite, Oval, Opaque

38.6 x 26.2 mm

$ 102.57

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0.72ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 19.72

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1.86ct Green Prehnite, Round, Transparent/Translucent

7.5 mm (calibrated)

$ 5.49

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0.91ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 15.08

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9.92ct Multicolor Coral, Oval, Translucent

16.4 x 13.1 mm

$ 30.98

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2.42ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.26

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1.95ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 3.90

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11.34ct Black Tourmaline, Emerald Cut, Opaque

19.2 x 9 mm

$ 56.47

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1.70ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 28.18

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63.65ct Multicolor Jasper, Oval, Opaque

40 x 31.7 mm

$ 31.37

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0.82ct White Rainbow Moonstone, Baguette, VS

7 x 5 mm (calibrated)

$ 28.59

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0.33ct Yellow Sphalerite, Round, SI-I1

4 mm (calibrated)

$ 16.43

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0.92ct Pink Morganite, Oval, VS

6.9 x 5.8 mm

$ 55.44

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19.16ct Multicolor Jasper, Oval, Opaque

25 x 18 mm (calibrated)

$ 15.84

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1.39ctw Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 19.38

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2.56ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 14.03

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6.89ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 51.68

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1.52ctw Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 10.60

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2.20ct Yellow Citrine, Flower Cut, Transparent

8 x 8 mm (calibrated)

$ 16.87

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2.97ct Violet Amethyst, Trillion, VS-SI

10 x 10 mm (calibrated)

$ 16.28

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2.83ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.21

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3.41ct Brown Tiger'S Eye, Oval, Opaque

9.5 x 7.4 mm

$ 3.39

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49.74ct Orange Druzy Citrine, Fancy, Opaque

30 x 22 mm (calibrated)

$ 48.80

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0.25ct Orange Spessartite Garnet, Oval, VS

4 x 3.1 mm

$ 8.72

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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 looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 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

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate
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