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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
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1.10ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 27.39

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4.53ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 32.90

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19.13ct Brown Jasper, Fancy, Opaque

40.2 x 12.3 mm

$ 26.68

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1.40ct Yellow Rutile Topaz, Pear Shape, Transparent

9 x 6 mm (calibrated)

$ 29.05

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1.00ct Multicolor Opal, Oval, Transparent

9.6 x 6.3 mm

$ 29.88

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2.90ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 22.24

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3.08ct Brown Cat'S Eye Scapolite, Round, Translucent

9 mm (calibrated)

$ 16.87

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0.91ct Yellow Sphene, Oval, Transparent

6.4 x 5.3 mm

$ 4.53

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1.51ct Orange Sunstone, Oval, Translucent

8.6 x 6.9 mm

$ 9.02

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5.60ctw Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 39.04

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1.31ct Green Tourmaline, Emerald Cut, VVS-VS

16.8 x 3.6 mm

$ 34.45

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9.32ct Multicolor Agate, Oval, Opaque

14.8 x 12.8 mm

$ 15.78

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15.56ct Violet Amethyst, Emerald Cut, VVS

18 x 13 mm (calibrated)

$ 108.48

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3.14ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 25.02

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3.42ct Green Tourmaline, Emerald Cut, VVS-VS

29.7 x 3.8 mm

$ 153.28

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0.59ct Orange Sphalerite, Round, SI

4.8 mm

$ 29.38

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41.48ct Multicolor Labradorite, Oval, Opaque

37.2 x 22.3 mm

$ 37.18

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15.16ct Violet Charoite, Pear Shape, Opaque

25.2 x 12.1 mm

$ 25.07

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0.81ct Orange Sphalerite, Oval, SI-I1

6 x 4.4 mm

$ 40.34

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16.39ctw Multicolor Fossil Coral, Cushion, Opaque

18 x 13 mm (calibrated)

$ 17.65

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23.88ctw Multicolor Fossil Coral, Pear Shape, Opaque

22.4 x 15 mm

$ 52.33

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2.64ct Orange Hessonite Garnet, Oval, VS-SI

8.9 x 7.4 mm

$ 47.41

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12.61ct Violet Jadeite, Oval, Translucent

19.9 x 12.4 mm

$ 27.63

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3.45ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 151.69

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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 -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

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
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

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate
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