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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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Yellow Untreated Gemstones
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0.89ct Turquoise Grandidierite, Pear Shape, Translucent

6.7 x 5.9 mm

$ 48.75

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1.11ct Multicolor Pietersite, Pear Shape, Opaque

10.5 x 5.9 mm

$ 2.62

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0.44ct Violet Amethyst, Emerald Cut, SI

6 x 4 mm (calibrated)

$ 2.56

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5.49ct Green Prehnite, Fancy, Transparent

15.9 x 11.4 mm

$ 8.91

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24.57ctw Multicolor Fossil Coral, Oval, Opaque

21.6 x 12.9 mm

$ 26.93

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1.38ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 63.50

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15.15ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 49.80

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5.83ctw Green Prehnite, Oval, Transparent

7.6 x 6.1 mm

$ 31.94

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1.24ct Yellow Citrine, Pear Shape, VVS-VS

9 x 6 mm (calibrated)

$ 12.22

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0.93ctw Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 32.42

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10.13ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 33.30

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3.24ctw Multicolor Labradorite, Round, Translucent

7 mm (calibrated)

$ 7.88

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17.95ct Violet Amethyst, Flower Cut, Translucent

18.4 x 17.8 mm

$ 59.00

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7.25ct Green Prehnite, Fancy, Translucent

15.9 x 10.2 mm

$ 11.92

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0.34ct Orange Spessartite Garnet, Oval, VS

4.9 x 3.2 mm

$ 11.85

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12.82ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 12.77

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1.51ct Green Tourmaline, Emerald Cut, VS

16.7 x 3.2 mm

$ 36.40

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2.19ct White Rainbow Moonstone, Cushion, VVS-VS

8 x 6.6 mm

$ 228.63

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3.42ct Blue Chalcedony, Oval, Transparent

11 x 9 mm (calibrated)

$ 6.81

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3.73ct Yellow Apatite, Emerald Cut, VVS-VS

9 x 9 mm (calibrated)

$ 192.07

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4.59ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 33.33

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0.89ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.21

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1.28ct White Cat'S Eye Moonstone, Round, Transparent

7 mm (calibrated)

$ 7.01

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2.21ct Green Peridot, Cushion, VS

7.9 x 7.6 mm

$ 94.43

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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

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D 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

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate
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