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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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Untreated Gemstones Treatment

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5.26ct Violet Amethyst, Marquise, VVS-VS

5.26ct Violet Amethyst, Marquise, VVS-VS

18 x 9.4 mm

$ 40.34

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1.56ctw Blue Kyanite, Round, SI

1.56ctw Blue Kyanite, Round, SI

5 mm (calibrated)

$ 38.84

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1.56ctw White Rainbow Moonstone, Pear Shape, Transparent

1.56ctw White Rainbow Moonstone, Pear Shape, Transparent

5 x 5 mm (calibrated)

$ 29.05

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0.71ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

0.71ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

8.9 x 4.2 mm

$ 24.89

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0.98ct Green Peridot, Emerald Cut, VVS-VS

0.98ct Green Peridot, Emerald Cut, VVS-VS

6.6 x 5 mm

$ 14.64

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1.21ct Pink Strawberry Quartz, Oval, Transparent

1.21ct Pink Strawberry Quartz, Oval, Transparent

7 x 5 mm (calibrated)

$ 6.04

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5.40ct Green Druzy Variscite, Fancy, Opaque

5.40ct Green Druzy Variscite, Fancy, Opaque

22.9 x 10.5 mm

$ 5.54

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1.64ct White Opal, Pear Shape, Transparent

1.64ct White Opal, Pear Shape, Transparent

12.7 x 7.8 mm

$ 41.24

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21.21ctw Multicolor Fossil Coral, Oval, Opaque

21.21ctw Multicolor Fossil Coral, Oval, Opaque

20.1 x 12.5 mm

$ 27.42

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0.36ct Yellow Diamond, Round, VS-SI
Diamond Product Video (564595)

0.36ct Yellow Diamond, Round, VS-SI

4.3 mm

$ 547.68

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1.16ct White Sillimanite Cat'S Eye, Oval, Transparent

1.16ct White Sillimanite Cat'S Eye, Oval, Transparent

6.4 x 5.8 mm

$ 4.45

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6.24ct Multicolor Rainbow Pyrite, Fancy, Opaque

6.24ct Multicolor Rainbow Pyrite, Fancy, Opaque

16.8 x 10.9 mm

$ 18.64

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0.61ct Orange Sphalerite, Round, SI

0.61ct Orange Sphalerite, Round, SI

5 mm (calibrated)

$ 30.38

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12.42ct White Rainbow Moonstone, Oval, Transparent

12.42ct White Rainbow Moonstone, Oval, Transparent

21.9 x 10 mm

$ 185.55

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1.32ct Orange Hessonite Garnet, Oval, VS-SI

1.32ct Orange Hessonite Garnet, Oval, VS-SI

7.4 x 6 mm

$ 26.29

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16.01ct Green Druzy Variscite, Fancy, Opaque

16.01ct Green Druzy Variscite, Fancy, Opaque

20.8 x 20.5 mm

$ 24.40

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2.86ct Turquoise Grandidierite, Oval, Translucent

2.86ct Turquoise Grandidierite, Oval, Translucent

11.1 x 8.4 mm

$ 313.34

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0.75ct Yellow Zircon, Oval, VVS-VS

0.75ct Yellow Zircon, Oval, VVS-VS

6 x 4.7 mm

$ 11.21

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0.32ctw Green Kornerupine, Oval, VVS-VS

0.32ctw Green Kornerupine, Oval, VVS-VS

3.9 x 2.9 mm

$ 17.53

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0.06ct Black Diamond, Round, Opaque

0.06ct Black Diamond, Round, Opaque

2.4 mm (calibrated)

$ 29.03

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1.66ct Green Sphene, Oval, Translucent

1.66ct Green Sphene, Oval, Translucent

7.1 x 6.5 mm

$ 8.27

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71.34ct Violet Charoite, Oval, Opaque
Charoite Product Video (435150)

71.34ct Violet Charoite, Oval, Opaque

45 x 31.3 mm

$ 117.24

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4.46ct Violet Amethyst, Pear Shape, VVS-VS

4.46ct Violet Amethyst, Pear Shape, VVS-VS

15 x 10 mm (calibrated)

$ 29.32

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6.01ct Brown Smoky Quartz, Pear Shape, VVS

6.01ct Brown Smoky Quartz, Pear Shape, VVS

14.9 x 11.1 mm

$ 11.97

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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

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate
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