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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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0.74ct Brown Color-Change Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 81.07

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44.70ct Multicolor Rhodochrosite, Pear Shape, Translucent

33.5 x 21.7 mm

$ 34.28

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3.20ctw Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 55.51

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2.11ct Red Coral, Oval, Opaque

11.9 x 5 mm

$ 288.96

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14.98ct Turquoise Grandidierite, Oval, SI-I1

17.5 x 14.6 mm

$ 672.90

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1.63ct Orange Sphalerite, Oval, SI-I1

7.3 x 5.3 mm

$ 81.17

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3.88ct Turquoise Fluorite, Marquise, Transparent

13.6 x 7.8 mm

$ 15.95

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19.94ct Multicolor Boulder Opal, Marquise, Opaque

36.4 x 16.3 mm

$ 109.23

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2.60ct Orange Hessonite Garnet, Cushion, SI

7 x 7 mm (calibrated)

$ 48.42

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30.31ct Green Maw-Sit-Sit, Baguette, Opaque

17 x 14.9 mm

$ 99.62

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1.08ct Green Peridot, Pear Shape, VS

8 x 6 mm (calibrated)

$ 15.49

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3.75ct Multicolor Ruby In Fuchsite, Marquise, Translucent

19.8 x 9.2 mm

$ 28.05

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25.29ctw Multicolor Fossil Coral, Cushion, Opaque

18.2 x 11.4 mm

$ 32.69

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6.30ct Pink Kunzite, Pear Shape, VS

12 x 10 mm (calibrated)

$ 144.48

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7.67ct Pink Strawberry Quartz, Oval, Translucent

14.9 x 11.1 mm

$ 48.24

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5.25ct Orange Hessonite Garnet, Oval, VS-SI

12 x 10 mm (calibrated)

$ 522.90

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0.25ct Yellow Diamond, Round, VS-SI

4 mm (calibrated)

$ 380.34

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1.13ct Yellow Chrysoberyl, Pear Shape, VVS-VS

8.2 x 5.6 mm

$ 131.69

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45.90ct Purple Kunzite, Pear Shape, VVS-VS

26.1 x 18.6 mm

$ 1,263.14

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49.22ct Brown Tiger'S Eye Matrix, Fancy, Opaque

30.5 x 20.6 mm

$ 49.02

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1.99ctw White Sillimanite Cat'S Eye, Oval, Transparent

7.5 x 5.6 mm

$ 6.54

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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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12.71ct Multicolor Fire Agate, Fancy, Opaque

23.3 x 10.6 mm

$ 83.08

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33.60ct Multicolor Labradorite, Round, Translucent

25 mm

$ 74.29

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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 -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
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Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
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Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 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

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate
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