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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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3.36ct Orange Sunstone, Round, Transparent

10 mm (calibrated)

$ 19.59

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3.71ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 28.45

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1.57ct Orange Hessonite Garnet, Oval, VS-SI

7 x 5 mm (calibrated)

$ 28.15

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0.24ct Violet Iolite, Emerald Cut, VS-SI

5 x 3 mm (calibrated)

$ 9.56

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1.71ct White Rainbow Moonstone, Round, Transparent

8 mm (calibrated)

$ 29.10

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3.40ct Red Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 26.08

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2.48ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 5.49

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1.99ct Yellow Citrine, Trillion, VVS

9 x 9 mm (calibrated)

$ 13.08

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3.60ctw Violet Amethyst, Heart, VS

6 x 6 mm (calibrated)

$ 19.72

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50.96ct Multicolor Jasper, Oval, Opaque

37.8 x 23.6 mm

$ 31.83

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23.01ct Gray Hematite, Baguette, Opaque

19.7 x 16.7 mm

$ 22.44

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8.38ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 32.13

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0.80ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

8.9 x 4 mm

$ 42.23

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6.36ct Violet Amethyst, Briolette, VS

12 x 10 mm (calibrated)

$ 27.87

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2.33ctw White Rainbow Moonstone, Oval, Transparent

6.9 x 5.9 mm

$ 45.65

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0.49ct Multicolor Chocolate Opal, Oval, Translucent

7.4 x 5.2 mm

$ 16.10

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2.35ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 115.87

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18.56ct Violet Amethyst, Emerald Cut, VVS

19.2 x 15 mm

$ 147.89

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8.61ct Brown Smoky Quartz, Emerald Cut, VVS

13 x 13 mm (calibrated)

$ 16.88

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1.97ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 13.74

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17.88ct White Howlite, Round, Opaque

20 mm (calibrated)

$ 8.37

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1.00ct Multicolor Opal, Oval, Transparent

8.4 x 5.5 mm

$ 20.75

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17.05ctw Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 18.68

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0.66ct Orange Zircon, Oval, VS

6 x 4 mm (calibrated)

$ 16.43

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

All good

Posted By DouscheGift in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate
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