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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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28.23ct Green Amazonite, Oval, Opaque

30 x 22 mm (calibrated)

$ 22.49

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1.81ct Orange Hessonite Garnet, Oval, SI

9 x 7 mm (calibrated)

$ 33.71

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33.26ct Multicolor Jasper, Baguette, Opaque

22.8 x 20.8 mm

$ 20.41

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1.68ct Yellow Citrine, Oval, Transparent

8 x 6 mm (calibrated)

$ 12.89

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1.05ct Green Tourmaline, Emerald Cut, VS

11.2 x 3.6 mm

$ 22.06

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17.19ct Green Maw-Sit-Sit, Oval, Opaque

16 x 13.4 mm

$ 56.51

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1.44ct Brown Smoky Quartz, Baguette, VVS

9 x 6 mm (calibrated)

$ 10.04

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1.75ct Orange Hessonite Garnet, Oval, VS

8 x 6.6 mm

$ 26.74

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0.72ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.6 x 4.6 mm

$ 26.74

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0.39ct Blue Kyanite, Round, SI

4.2 mm

$ 9.71

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1.01ct Green Chrysoberyl, Marquise, VVS

9 x 4.5 mm

$ 98.14

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4.81ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 28.99

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0.94ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 6.56

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2.08ct Orange Sphalerite, Oval, SI-I1

8 x 6 mm (calibrated)

$ 103.58

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17.67ctw Multicolor Jasper, Cushion, Opaque

19.6 x 13.9 mm

$ 10.39

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5.03ctw Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 10.02

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4.00ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 8.85

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29.62ct Gray Hematite, Marquise, Opaque

28.5 x 13.5 mm

$ 28.88

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16.70ctw Yellow Rutile Quartz, Round, Transparent

13 mm (calibrated)

$ 45.38

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1.88ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 49.93

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2.28ct Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 10.42

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64.75ct Green Amazonite, Square, Opaque

23.4 x 23.1 mm

$ 37.62

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4.36ctw Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 95.53

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2.92ct Brown Cat'S Eye Scapolite, Round, Translucent

9 mm (calibrated)

$ 15.99

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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

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate
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