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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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0.93ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 7.13

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0.14ctw Black Diamond, Square, Opaque

2 x 1.9 mm

$ 69.72

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6.62ct Purple Kunzite, Emerald Cut, VVS-VS

10.6 x 8.6 mm

$ 145.06

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1.93ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 32.46

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27.92ct White Agate, Oval, Opaque

27.5 x 20.9 mm

$ 44.21

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1.00ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

11.3 x 4.4 mm

$ 35.06

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0.02ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 15.94

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1.51ct Pink Morganite, Round, VS

7.5 mm (calibrated)

$ 115.80

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7.36ct Multicolor Labradorite, Pear Shape, Translucent

14 x 10 mm (calibrated)

$ 16.28

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1.12ct Yellow Color-Change Diaspore, Emerald Cut, VS

7.5 x 4.4 mm

$ 58.61

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33.38ctw Multicolor Fossil Coral, Cushion, Opaque

20.3 x 13.2 mm

$ 54.86

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32.39ct Multicolor Labradorite, Oval, Opaque

31.7 x 20.4 mm

$ 29.03

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8.35ct Green Prehnite, Fancy, Transparent

18.2 x 11.8 mm

$ 11.61

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4.05ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 22.19

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5.47ct Multicolor Fire Agate, Fancy, Opaque

11.1 x 10 mm

$ 42.06

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0.21ct White Diamond, Round, VVS

3.8 mm

$ 352.58

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2.89ct Brown Rutile Topaz, Pear Shape, Transparent

12 x 8 mm (calibrated)

$ 59.97

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13.93ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 69.37

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1.37ct Purple Spinel, Cushion, VVS

6.4 x 6.2 mm

$ 78.59

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4.71ctw Green Prehnite, Oval, Transparent/Translucent

8.1 x 6.9 mm

$ 13.94

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0.49ct White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 2.24

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8.38ct Pink Morganite, Oval, Translucent

16 x 12 mm (calibrated)

$ 91.81

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5.10ct Pink Morganite, Pear Shape, Transparent

14 x 10 mm (calibrated)

$ 21.17

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2.32ct Yellow Golden Beryl, Oval, VS

10 x 8 mm (calibrated)

$ 63.54

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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

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 2025
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Overall Rating -> 10 star ratings

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

Posted By Zorah in February, 2026
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Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 2026
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Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
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Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
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Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
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