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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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15.92ctw Green Seraphinite, Baguette, Opaque

14 x 10 mm (calibrated)

$ 21.95

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1.35ctw Green Demantoid Garnet, Oval, VS

4.3 x 3.5 mm

$ 147.91

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5.26ctw Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 57.63

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59.13ct Violet Amethyst, Oval, VVS-VS

28.2 x 22 mm

$ 412.25

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4.22ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 89.74

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8.60ct Yellow Rutile Quartz, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 23.36

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23.47ctw Multicolor Fossil Coral, Oval, Opaque

20.4 x 11.9 mm

$ 30.34

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3.21ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 24.62

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2.74ct Yellow Prehnite, Oval, Transparent/Translucent

9 x 7 mm (calibrated)

$ 25.70

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25.96ct Violet Amethyst, Oval, VVS-VS

22.8 x 18.4 mm

$ 199.09

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27.29ct Brown Moonstone, Oval, Opaque

25 x 18 mm (calibrated)

$ 44.85

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0.77ct Green Sphene, Oval, VS

6.6 x 4.7 mm

$ 37.96

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3.00ctw Yellow Citrine, Heart, VVS

8 x 8 mm (calibrated)

$ 20.92

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4.02ctw Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 8.81

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6.83ct Turquoise Tourmaline, Flower Cut, Transparent

11.5 x 5.9 mm

$ 133.12

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2.32ctw Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 50.84

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0.38ct Yellow Color-Change Diaspore, Cushion, VVS

4.9 x 4.4 mm

$ 20.06

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1.83ct Pink Tourmaline, Oval, VVS-VS

8 x 6.5 mm

$ 273.40

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87.65ct Pink Rose Quartz, Square, Opaque

25.4 x 25.3 mm

$ 181.88

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2.74ct Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 15.01

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0.77ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.37

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1.13ct Yellow Citrine, Square, VVS

6 x 6 mm (calibrated)

$ 7.88

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0.75ct Yellow Beryl, Oval, VS

7 x 5 mm (calibrated)

$ 14.94

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10.60ctw Green Prehnite, Fancy, Translucent

15.2 x 10.7 mm

$ 15.84

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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

Very good.

Posted By Tommy in December, 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
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Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
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Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
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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

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate
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