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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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0.64ct Green Tourmaline, Emerald Cut, VVS-VS

0.64ct Green Tourmaline, Emerald Cut, VVS-VS

4.6 x 4.6 mm

$ 31.87

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0.96ctw Green Peridot, Pear Shape, VVS-VS

0.96ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 8.42

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12.33ct Multicolor Labradorite, Round, Translucent

12.33ct Multicolor Labradorite, Round, Translucent

16 mm (calibrated)

$ 26.53

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2.83ct Violet Amethyst, Trillion, VVS-VS

2.83ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 22.55

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6.62ct Brown Smoky Quartz, Emerald Cut, VVS-VS

6.62ct Brown Smoky Quartz, Emerald Cut, VVS-VS

12 x 12 mm (calibrated)

$ 12.99

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5.99ct Pink Strawberry Quartz, Oval, Translucent

5.99ct Pink Strawberry Quartz, Oval, Translucent

14 x 10 mm (calibrated)

$ 36.11

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7.48ct Green Prehnite, Fancy, Translucent

7.48ct Green Prehnite, Fancy, Translucent

14.7 x 10.9 mm

$ 12.29

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1.28ct Brown Chocolate Opal, Oval, Opaque

1.28ct Brown Chocolate Opal, Oval, Opaque

9 x 7 mm (calibrated)

$ 38.25

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0.62ct Green Chrysoberyl Cat'S Eye, Round, Translucent

0.62ct Green Chrysoberyl Cat'S Eye, Round, Translucent

5 mm (calibrated)

$ 18.53

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36.14ct Green Seraphinite, Oval, Opaque

36.14ct Green Seraphinite, Oval, Opaque

38 x 23.7 mm

$ 21.78

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1.07ct Brown Color-Change Garnet, Oval, VVS-VS

1.07ct Brown Color-Change Garnet, Oval, VVS-VS

7.4 x 5.2 mm

$ 85.47

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3.06ct Yellow Citrine, Oval, VVS-VS

3.06ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 13.40

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3.59ct Pink Morganite, Pear Shape, Transparent

3.59ct Pink Morganite, Pear Shape, Transparent

14.2 x 8.2 mm

$ 14.90

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8.37ct Brown Smoky Quartz, Emerald Cut, VVS

8.37ct Brown Smoky Quartz, Emerald Cut, VVS

12 x 12 mm (calibrated)

$ 16.42

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5.97ct Brown Smoky Quartz, Round, VVS

5.97ct Brown Smoky Quartz, Round, VVS

13 mm (calibrated)

$ 11.71

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4.07ct Multicolor Labradorite, Pear Shape, Translucent

4.07ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 9.01

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38.93ctw Green Seraphinite, Sphere / Ball, Opaque

38.93ctw Green Seraphinite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 63.98

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0.81ctw Green Peridot, Pear Shape, VVS-VS

0.81ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 13.31

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0.43ct Orange Citrine, Marquise, VS

0.43ct Orange Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 3.21

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0.59ct Purple Spinel, Round, VS

0.59ct Purple Spinel, Round, VS

4.7 mm

$ 30.93

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17.93ct White Rainbow Moonstone, Pear Shape, Translucent

17.93ct White Rainbow Moonstone, Pear Shape, Translucent

23.8 x 14.1 mm

$ 125.01

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3.51ct Pink Strawberry Quartz, Oval, Translucent

3.51ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 26.93

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2.38ctw Pink Strawberry Quartz, Oval, Translucent

2.38ctw Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 14.74

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1.46ct Yellow Citrine, Emerald Cut, VVS-VS

1.46ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 11.64

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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

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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