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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
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Yellow Untreated Gemstones
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2.17ct Pink Kunzite, Pear Shape, VS

7.6 x 7.2 mm

$ 64.84

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18.77ctw White Rainbow Moonstone, Marquise, Transparent

23 x 8.4 mm

$ 336.51

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3.81ct Multicolor Fire Agate, Fancy, Opaque

11.6 x 9.1 mm

$ 53.68

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21.85ct Multicolor Amethyst Geode Slice, Fancy, Transparent

24 x 21.7 mm

$ 23.29

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56.08ct Multicolor Jasper, Pear Shape, Opaque

36.6 x 33.2 mm

$ 61.44

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24.80ctw Brown Tiger'S Eye, Flower Cut, Opaque

16 x 16 mm (calibrated)

$ 27.17

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1.43ct Violet Spinel, Oval, VS-SI

7.5 x 5.6 mm

$ 237.38

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42.66ct Multicolor Quartz With Marcasite, Round, Transparent

25.1 mm

$ 280.43

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13.86ctw Green Aventurine, Fancy, Translucent

18.4 x 11.8 mm

$ 30.37

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1.35ct Yellow Color-Change Diaspore, Pear Shape, VS-SI

9.5 x 5.5 mm

$ 64.64

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3.65ct Yellow Cat'S Eye Opal, Oval, Opaque

11.4 x 8.1 mm

$ 15.15

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6.31ct Turquoise Grandidierite, Oval, SI-I1

13 x 11 mm (calibrated)

$ 283.45

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5.50ctw Green Prehnite, Oval, Transparent

7.4 x 6.2 mm

$ 30.13

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14.38ct White Howlite, Pear Shape, Opaque

23.2 x 16.4 mm

$ 6.73

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17.53ct Red Strawberry Quartz, Oval, Translucent

20 x 15 mm (calibrated)

$ 112.03

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0.30ct Green Peridot, Emerald Cut, VVS-VS

5 x 3 mm (calibrated)

$ 4.06

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6.84ct Green Actinolite Cat'S Eye, Oval, Translucent

14 x 10 mm (calibrated)

$ 47.69

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1.06ct Purple Sapphire, Pear Shape, VS

8.2 x 5.6 mm

$ 559.00

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130.91ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

47 x 43.6 mm

$ 430.27

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6.82ct Multicolor Fire Agate, Fancy, Translucent

12.7 x 11.4 mm

$ 53.49

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19.00ct Green Maw-Sit-Sit, Round, Opaque

14 mm (calibrated)

$ 44.34

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41.69ct Multicolor Rainbow Pyrite, Fancy, Opaque

26.2 x 19 mm

$ 107.96

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10.19ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

20.2 x 9.9 mm

$ 75.14

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3000.00ct Blue Lapis Lazuli, Sphere / Ball, Opaque

71 mm

$ 1,774.87

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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

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE 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

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate
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