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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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0.83ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.79

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2.48ct Black Cat'S Eye Scapolite, Round, Translucent

9 mm (calibrated)

$ 13.59

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5.35ct Yellow Rutile Quartz, Pear Shape, Transparent

14.7 x 10.8 mm

$ 14.54

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3.91ct Violet Amethyst, Round, VS

11 mm (calibrated)

$ 25.71

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6.37ctw Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 34.90

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14.37ct Multicolor Labradorite, Round, Translucent

16 mm (calibrated)

$ 17.17

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0.72ct Multicolor Chocolate Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 23.66

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2.61ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 18.19

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14.23ct Multicolor Agate, Fancy, Translucent

19.2 x 9 mm

$ 24.92

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2.70ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 17.75

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1.83ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.04

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1.57ct Red Ruby, Emerald Cut, VVS-VS

8 x 5 mm (calibrated)

$ 5,212.40

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4.09ct Yellow Citrine, Emerald Cut, VVS-VS

12 x 8 mm (calibrated)

$ 31.37

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4.31ct Brown Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 11.80

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1.46ct Green Tourmaline, Emerald Cut, VVS-VS

13 x 3.5 mm

$ 38.39

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1.19ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 8.30

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1.44ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 10.04

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3.88ct Pink Rose Quartz, Emerald Cut, Transparent

9.5 x 9.3 mm

$ 21.26

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6.34ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 6.32

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8.83ct Brown Moonstone, Oval, Translucent

15 x 10 mm (calibrated)

$ 19.07

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0.39ct Purple Spinel, Cushion, VVS-VS

4.3 x 4.3 mm

$ 27.19

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10.54ct Multicolor Pietersite, Cushion, Opaque

14 x 14 mm (calibrated)

$ 34.99

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6.23ct Multicolor Pietersite, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 20.68

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12.07ct Bi-Color Ametrine, Oval, VVS

17.4 x 13.6 mm

$ 119.01

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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

Great! Affordable

Posted By Spinellope in April, 2026
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Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
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Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
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Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
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Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 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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