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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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4.95ct Multicolor Pietersite, Oval, Opaque

4.95ct Multicolor Pietersite, Oval, Opaque

13.3 x 9.5 mm

$ 16.28

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1.14ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.14ct Yellow Color-Change Diaspore, Cushion, VVS-VS

7.6 x 5.4 mm

$ 59.66

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21.91ct Violet Amethyst, Cushion, VVS

21.91ct Violet Amethyst, Cushion, VVS

18.1 x 8 mm

$ 174.58

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1.56ct Yellow Citrine, Emerald Cut, VVS-VS

1.56ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 10.87

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2.31ct Yellow Citrine, Trillion, VS

2.31ct Yellow Citrine, Trillion, VS

9 x 9 mm (calibrated)

$ 12.50

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16.74ctw Green Aventurine, Pear Shape, Translucent

16.74ctw Green Aventurine, Pear Shape, Translucent

19.2 x 13 mm

$ 38.69

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0.63ct Orange Sphalerite, Round, SI

0.63ct Orange Sphalerite, Round, SI

4.7 mm

$ 31.37

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5.28ct Violet Amethyst, Pear Shape, VVS

5.28ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 34.71

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5.26ctw Multicolor Labradorite, Pear Shape, Translucent

5.26ctw Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 11.64

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1.42ct Multicolor Labradorite, Marquise, Translucent

1.42ct Multicolor Labradorite, Marquise, Translucent

10 x 5 mm (calibrated)

$ 3.14

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76.92ct White Rainbow Moonstone, Pear Shape, Translucent
Rainbow Moonstone Product Video (723050)

76.92ct White Rainbow Moonstone, Pear Shape, Translucent

37.4 x 30.9 mm

$ 536.29

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1.22ctw Orange Zircon, Oval, VVS-VS

1.22ctw Orange Zircon, Oval, VVS-VS

5.3 x 4.2 mm

$ 30.38

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12.47ct Violet Amethyst, Round, VVS

12.47ct Violet Amethyst, Round, VVS

16 mm (calibrated)

$ 86.94

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11.12ct White Quartz, Emerald Cut, VVS-VS

11.12ct White Quartz, Emerald Cut, VVS-VS

14 x 14 mm (calibrated)

$ 19.37

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3.00ct Blue Chalcedony, Oval, Transparent

3.00ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 5.98

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10.70ct Brown Tiger'S Eye, Oval, Opaque

10.70ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 6.28

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11.55ct Multicolor Agate, Oval, Opaque

11.55ct Multicolor Agate, Oval, Opaque

14.3 x 13.1 mm

$ 19.56

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1.55ct Green Tourmaline, Cushion, VVS-VS

1.55ct Green Tourmaline, Cushion, VVS-VS

6.7 x 5.9 mm

$ 231.57

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1.27ct Green Sphene, Oval, Transparent

1.27ct Green Sphene, Oval, Transparent

6.6 x 5.2 mm

$ 6.32

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1.25ctw Red Pyrope Garnet, Pear Shape, VVS-VS

1.25ctw Red Pyrope Garnet, Pear Shape, VVS-VS

6.9 x 4.7 mm

$ 9.96

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0.97ct Green Sphene, Round, Transparent

0.97ct Green Sphene, Round, Transparent

6 mm (calibrated)

$ 4.83

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27.45ct Multicolor Jasper, Fancy, Opaque
Jasper Product Video (393956)

27.45ct Multicolor Jasper, Fancy, Opaque

29.7 x 15.9 mm

$ 30.08

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1.56ct Violet Amethyst, Trillion, VS

1.56ct Violet Amethyst, Trillion, VS

8 x 8 mm (calibrated)

$ 10.31

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2.78ctw Yellow Citrine, Emerald Cut, VVS-VS

2.78ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 21.32

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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

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

Good, hope gem quality is good and genuine

Posted By Varun in May, 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 process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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