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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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3.71ct Red Almandine Garnet, Heart, VS

3.71ct Red Almandine Garnet, Heart, VS

9.9 x 9.5 mm

$ 107.78

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8.84ct Brown Tiger'S Eye, Cushion, Opaque

8.84ct Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 8.81

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8.64ctw Violet Amethyst, Oval, Transparent

8.64ctw Violet Amethyst, Oval, Transparent

12 x 10 mm (calibrated)

$ 47.33

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3.08ct Red Almandine Garnet, Oval, VVS-VS

3.08ct Red Almandine Garnet, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 89.47

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4.88ctw Red Pyrope Garnet, Pear Shape, VVS-VS

4.88ctw Red Pyrope Garnet, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 37.43

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1.48ct Multicolor Opal, Oval, Translucent

1.48ct Multicolor Opal, Oval, Translucent

9.4 x 7.6 mm

$ 36.85

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8.03ctw Green Prehnite, Oval, Transparent/Translucent

8.03ctw Green Prehnite, Oval, Transparent/Translucent

8.3 x 7.5 mm

$ 43.99

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0.63ct Yellow Color-Change Diaspore, Round, VS-SI

0.63ct Yellow Color-Change Diaspore, Round, VS-SI

4.8 mm

$ 22.12

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6.76ct Green Jadeite, Oval, Translucent

6.76ct Green Jadeite, Oval, Translucent

16.3 x 12.9 mm

$ 22.22

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2.46ct Multicolor Labradorite, Baguette, Translucent

2.46ct Multicolor Labradorite, Baguette, Translucent

8 x 6 mm (calibrated)

$ 5.39

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0.43ct Orange Sphalerite, Oval, VS-SI

0.43ct Orange Sphalerite, Oval, VS-SI

4.5 x 4 mm

$ 21.41

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10.03ct Multicolor Agate, Oval, Opaque

10.03ct Multicolor Agate, Oval, Opaque

14.1 x 12.7 mm

$ 16.98

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1.69ct Pink Tourmaline, Oval, Transparent

1.69ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 28.97

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1.39ct Yellow Citrine, Cushion, Transparent

1.39ct Yellow Citrine, Cushion, Transparent

8 x 6 mm (calibrated)

$ 10.66

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18.77ctw Multicolor Labradorite, Pear Shape, Translucent

18.77ctw Multicolor Labradorite, Pear Shape, Translucent

20 x 15 mm (calibrated)

$ 41.13

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1.55ct Violet Amethyst, Marquise, VS

1.55ct Violet Amethyst, Marquise, VS

12 x 5.9 mm

$ 11.89

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8.52ct White Rainbow Moonstone, Marquise, Transparent

8.52ct White Rainbow Moonstone, Marquise, Transparent

23.8 x 7.9 mm

$ 152.74

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2.45ctw Red Pyrope Garnet, Emerald Cut, VS

2.45ctw Red Pyrope Garnet, Emerald Cut, VS

5.8 x 3.8 mm

$ 18.79

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5.57ct Purple Kunzite, Oval, VS

5.57ct Purple Kunzite, Oval, VS

11.3 x 9.6 mm

$ 153.28

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2.24ctw Multicolor Andalusite, Round, VS-SI
Andalusite Product Video (221438)

2.24ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 110.44

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3.33ct Yellow Citrine, Oval, VVS-VS

3.33ct Yellow Citrine, Oval, VVS-VS

11.5 x 9.6 mm

$ 26.54

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15.55ct Pink Kunzite, Emerald Cut, VS
Kunzite Product Video (694819)

15.55ct Pink Kunzite, Emerald Cut, VS

16 x 12 mm (calibrated)

$ 387.20

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0.56ct Green Peridot, Emerald Cut, VVS

0.56ct Green Peridot, Emerald Cut, VVS

6 x 4 mm (calibrated)

$ 8.37

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0.61ct Purple Spinel, Oval, VVS

0.61ct Purple Spinel, Oval, VVS

5.7 x 4.9 mm

$ 42.53

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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

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
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Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
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Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate
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