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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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2.66ct Pink Rose Quartz, Flower Cut, Transparent

2.66ct Pink Rose Quartz, Flower Cut, Transparent

14.7 x 9 mm

$ 11.65

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20.37ct Violet Amethyst, Cushion, VVS

20.37ct Violet Amethyst, Cushion, VVS

18 x 18 mm (calibrated)

$ 142.02

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1.01ct Green Tourmaline, Emerald Cut, VVS

1.01ct Green Tourmaline, Emerald Cut, VVS

12 x 3.6 mm

$ 25.15

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4.16ct Yellow Citrine, Oval, VS

4.16ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 22.79

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1.45ct Orange Zircon, Emerald Cut, VVS

1.45ct Orange Zircon, Emerald Cut, VVS

7 x 5.3 mm

$ 23.84

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7.68ctw White Topaz, Square, VVS

7.68ctw White Topaz, Square, VVS

5 x 5 mm (calibrated)

$ 63.95

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18.57ct White Rainbow Moonstone, Pear Shape, Translucent

18.57ct White Rainbow Moonstone, Pear Shape, Translucent

22.4 x 16.4 mm

$ 129.47

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0.55ct Green Chrysoberyl Cat'S Eye, Oval, Translucent

0.55ct Green Chrysoberyl Cat'S Eye, Oval, Translucent

4.7 x 4.5 mm

$ 16.43

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1.32ct Green Peridot, Oval, VS

1.32ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 20.25

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9.54ct Brown Smoky Quartz, Emerald Cut, VVS

9.54ct Brown Smoky Quartz, Emerald Cut, VVS

12.6 x 12.5 mm

$ 26.14

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0.90ctw Yellow Citrine, Oval, VS

0.90ctw Yellow Citrine, Oval, VS

6 x 4 mm (calibrated)

$ 6.91

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56.06ctw Gray Hematite, Baguette, Opaque

56.06ctw Gray Hematite, Baguette, Opaque

18.6 x 15.8 mm

$ 54.66

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7.95ct Brown Smoky Quartz, Emerald Cut, VVS-VS

7.95ct Brown Smoky Quartz, Emerald Cut, VVS-VS

12 x 12 mm (calibrated)

$ 43.56

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0.09ctw Black Diamond, Round, Opaque

0.09ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 71.71

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4.25ct Green Malachite, Oval, Opaque

4.25ct Green Malachite, Oval, Opaque

9 x 7 mm (calibrated)

$ 4.23

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33.55ct Multicolor Jasper, Trillion, Translucent

33.55ct Multicolor Jasper, Trillion, Translucent

35.4 x 24.5 mm

$ 26.48

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0.80ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.80ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

5.6 x 5 mm

$ 24.54

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3.37ct Yellow Citrine, Pear Shape, VVS-VS
Citrine Product Video (558061)

3.37ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 21.16

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0.56ct Green Cat'S Eye Alexandrite, Oval, Opaque

0.56ct Green Cat'S Eye Alexandrite, Oval, Opaque

5.4 x 3.9 mm

$ 116.20

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17.76ctw Multicolor Fossil Coral, Fancy, Opaque

17.76ctw Multicolor Fossil Coral, Fancy, Opaque

20.6 x 10.3 mm

$ 22.97

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2.68ct Green Prehnite, Oval, Transparent

2.68ct Green Prehnite, Oval, Transparent

9.8 x 7.7 mm

$ 14.68

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19.98ct Multicolor Jasper, Pear Shape, Opaque

19.98ct Multicolor Jasper, Pear Shape, Opaque

24.5 x 22.2 mm

$ 15.77

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9.41ct Yellow Rutile Quartz, Round, Translucent

9.41ct Yellow Rutile Quartz, Round, Translucent

15 mm (calibrated)

$ 25.56

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4.81ct Turquoise Aquamarine, Square, Translucent

4.81ct Turquoise Aquamarine, Square, Translucent

10 x 10 mm (calibrated)

$ 99.81

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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

Easy and functional

Posted By Dessa in March, 2026
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
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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

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate

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
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