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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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3.64ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 25.38

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1.90ctw White Sillimanite Cat'S Eye, Oval, Transparent

7.5 x 5 mm

$ 6.24

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2.84ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 22.63

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0.89ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 6.82

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23.84ctw Multicolor Jasper, Sphere / Ball, Opaque

12 mm (calibrated)

$ 26.11

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1.23ctw White Rainbow Moonstone, Oval, Transparent

7 x 5 mm (calibrated)

$ 20.82

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2.95ctw Purple Rhodolite Garnet, Oval, VS

5 x 3 mm (calibrated)

$ 31.91

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10.05ct Green Rutile Quartz, Oval, Transparent

20.3 x 11.1 mm

$ 23.90

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29.84ct Multicolor Jasper, Oval, Opaque

30.5 x 18.7 mm

$ 35.96

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0.55ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.22

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2.49ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.65

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2.96ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 16.22

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2.26ct Turquoise Fluorite, Oval, Transparent

9.4 x 7.4 mm

$ 9.01

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0.49ct White Rainbow Moonstone, Baguette, Transparent

6 x 4 mm (calibrated)

$ 17.08

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13.95ct Brown Tiger'S Eye, Oval, Opaque

20 x 15 mm (calibrated)

$ 15.29

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6.48ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 6.46

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6.89ct Yellow Citrine, Emerald Cut, VVS-VS

14 x 10 mm (calibrated)

$ 52.84

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1.93ct Pink Tourmaline, Round, VVS-VS

8 mm (calibrated)

$ 224.27

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72.62ct Violet Amethyst, Cushion, VVS

32.7 x 22.5 mm

$ 506.31

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1.07ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 26.64

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2.54ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.91

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4.37ct Yellow Rutile Topaz, Heart, Transparent

11.6 x 10 mm

$ 90.68

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4.30ct White Topaz, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 32.98

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2.52ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 22.05

View Gem
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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

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
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

Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 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

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

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate
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