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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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0.60ct Orange Citrine, Oval, VVS-VS

0.60ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 5.98

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1.27ct Pink Morganite, Oval, VVS

1.27ct Pink Morganite, Oval, VVS

8.8 x 6.5 mm

$ 111.31

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1.02ct Orange Zircon, Oval, VS

1.02ct Orange Zircon, Oval, VS

6.2 x 5 mm

$ 15.24

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10.32ctw Green Prehnite, Oval, Transparent

10.32ctw Green Prehnite, Oval, Transparent

8.8 x 7.7 mm

$ 65.95

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1.69ctw Yellow Citrine, Trillion, VS

1.69ctw Yellow Citrine, Trillion, VS

6.3 x 6.2 mm

$ 11.79

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12.26ct Multicolor Jasper, Oval, Opaque

12.26ct Multicolor Jasper, Oval, Opaque

22.7 x 16.6 mm

$ 10.14

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1.66ct Multicolor Labradorite, Pear Shape, Translucent

1.66ct Multicolor Labradorite, Pear Shape, Translucent

9 x 6 mm (calibrated)

$ 3.68

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17.63ct Brown Star Sunstone, Oval, Opaque

17.63ct Brown Star Sunstone, Oval, Opaque

17.9 x 14.2 mm

$ 146.33

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0.63ct Green Peridot, Marquise, VS

0.63ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 9.41

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1.60ct Violet Amethyst, Marquise, VS

1.60ct Violet Amethyst, Marquise, VS

12 x 6 mm

$ 12.27

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0.63ct Green Peridot, Marquise, VVS-VS

0.63ct Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 10.04

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5.62ctw Yellow Prehnite, Oval, Transparent/Translucent

5.62ctw Yellow Prehnite, Oval, Transparent/Translucent

9.4 x 7 mm

$ 52.71

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1.62ctw Red Pyrope Garnet, Square, VS

1.62ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.42

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4.05ct Yellow Citrine, Emerald Cut, VVS-VS

4.05ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 31.07

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18.26ct Green Uvarovite Garnet Drusy, Oval, Opaque

18.26ct Green Uvarovite Garnet Drusy, Oval, Opaque

23.9 x 13.7 mm

$ 59.41

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26.59ct Gray Jadeite, Oval, Translucent

26.59ct Gray Jadeite, Oval, Translucent

20.8 x 16.4 mm

$ 31.76

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4.98ctw Yellow Citrine, Oval, VVS

4.98ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 27.28

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2.68ctw Pink Tourmaline, Round, Transparent

2.68ctw Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 44.42

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3.57ctw Multicolor Andalusite, Round, VS
Andalusite Product Video (382330)

3.57ctw Multicolor Andalusite, Round, VS

3.2 mm

$ 130.80

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11.12ct Green Maw-Sit-Sit, Baguette, Opaque

11.12ct Green Maw-Sit-Sit, Baguette, Opaque

14.6 x 9 mm

$ 33.22

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2.48ctw White Rainbow Moonstone, Oval, Transparent

2.48ctw White Rainbow Moonstone, Oval, Transparent

7.1 x 6.1 mm

$ 81.53

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27.63ct Black Obsidian, Oval, Opaque

27.63ct Black Obsidian, Oval, Opaque

33 x 21.6 mm

$ 24.21

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30.37ct Gray Hematite, Baguette, Opaque

30.37ct Gray Hematite, Baguette, Opaque

18.8 x 16.5 mm

$ 29.61

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0.92ct Yellow Color-Change Diaspore, Marquise, VS-SI

0.92ct Yellow Color-Change Diaspore, Marquise, VS-SI

10.2 x 4.8 mm

$ 48.07

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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

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 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

Excellent options

Posted By CJ in February, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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