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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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0.93ct Green Peridot, Emerald Cut, VVS

7 x 5 mm (calibrated)

$ 14.82

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1.10ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 20.82

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2.05ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.1 mm

$ 17.97

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0.61ct Green Tourmaline, Baguette, VS

7.8 x 3.1 mm

$ 21.26

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9.45ct Black Tourmaline, Emerald Cut, Opaque

13 x 9 mm (calibrated)

$ 47.06

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1.59ct Pink Tourmaline, Emerald Cut, VVS-VS

8.7 x 4.9 mm

$ 114.97

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3.70ct Pink Kunzite, Cushion, VVS

10 x 7 mm (calibrated)

$ 92.13

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19.52ct Turquoise Grandidierite, Oval, Translucent

17.3 x 14.2 mm

$ 2,138.61

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1.53ct Violet Amethyst, Marquise, VS

11.8 x 6 mm

$ 10.06

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25.75ctw Multicolor Fossil Coral, Cushion, Opaque

19.7 x 11.8 mm

$ 55.87

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1.62ct Black Star Diopside, Oval, Opaque

8 x 6 mm (calibrated)

$ 8.07

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0.80ct Pink Spinel, Cushion, VVS-VS

5.8 x 4.9 mm

$ 55.78

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0.85ct Orange Hessonite Garnet, Pear Shape, VS

7 x 5 mm (calibrated)

$ 15.84

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0.44ct Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 10.96

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15.02ct Gray Jadeite, Oval, Translucent

20.8 x 13.6 mm

$ 32.91

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5.04ct Yellow Moonstone, Oval, Translucent

12.7 x 9.5 mm

$ 10.87

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8.24ct Multicolor Fire Agate, Fancy, Opaque

13.4 x 10.9 mm

$ 69.79

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2.89ct Green Tourmaline, Emerald Cut, VVS-VS

6.7 x 7.3 mm

$ 335.82

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1.40ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 24.00

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4.86ctw Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 53.24

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3.80ctw Multicolor Labradorite, Round, Translucent

7 mm (calibrated)

$ 4.54

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2.44ct Green Prehnite, Oval, Transparent

10 x 7 mm (calibrated)

$ 13.36

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1.02ct Yellow Morganite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 44.70

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1.89ct Yellow Citrine, Pear Shape, VVS-VS

10.7 x 7.3 mm

$ 14.49

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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

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate
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