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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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3.73ct Red Almandine Garnet, Oval, VVS

3.73ct Red Almandine Garnet, Oval, VVS

11 x 9 mm (calibrated)

$ 139.32

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1.37ct Violet Amethyst, Marquise, VS

1.37ct Violet Amethyst, Marquise, VS

12 x 6 mm

$ 10.51

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2.01ct Yellow Citrine, Square, VS

2.01ct Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 13.21

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35.42ct Gray Hematite, Oval, Opaque

35.42ct Gray Hematite, Oval, Opaque

25 x 18 mm (calibrated)

$ 23.29

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22.28ctw Multicolor Fossil Coral, Oval, Opaque

22.28ctw Multicolor Fossil Coral, Oval, Opaque

20.7 x 11.4 mm

$ 28.80

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6.20ct Yellow Citrine, Round, VVS

6.20ct Yellow Citrine, Round, VVS

12 mm (calibrated)

$ 47.55

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2.35ctw Multicolor Labradorite, Round, Translucent

2.35ctw Multicolor Labradorite, Round, Translucent

6.5 mm (calibrated)

$ 5.06

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0.41ct Yellow Citrine, Oval, VVS-VS

0.41ct Yellow Citrine, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 2.86

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9.08ct Brown Tiger'S Eye, Cushion, Opaque

9.08ct Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 9.05

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1.51ct Green Tourmaline, Emerald Cut, VVS-VS

1.51ct Green Tourmaline, Emerald Cut, VVS-VS

16.1 x 3.4 mm

$ 31.59

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18.06ctw Gray Hematite, Oval, Opaque

18.06ctw Gray Hematite, Oval, Opaque

18.1 x 9 mm

$ 17.61

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2.87ct Violet Amethyst, Trillion, VVS-VS

2.87ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 20.01

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7.04ct Violet Amethyst, Marquise, VVS-VS

7.04ct Violet Amethyst, Marquise, VVS-VS

18.3 x 9.4 mm

$ 53.99

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2.93ctw White Topaz, Cushion, VVS-VS

2.93ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 16.05

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0.77ct Green Sphene, Oval, Transparent

0.77ct Green Sphene, Oval, Transparent

6.1 x 4.7 mm

$ 3.83

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2.32ct Brown Tiger'S Eye, Round, Opaque

2.32ct Brown Tiger'S Eye, Round, Opaque

8 mm (calibrated)

$ 2.31

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0.48ct Orange Sphalerite, Round, SI

0.48ct Orange Sphalerite, Round, SI

4.5 mm (calibrated)

$ 23.90

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0.31ct Violet Iolite, Emerald Cut, VS-SI

0.31ct Violet Iolite, Emerald Cut, VS-SI

5 x 3 mm (calibrated)

$ 12.35

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28.75ct Blue Turquoise, Oval, Opaque

28.75ct Blue Turquoise, Oval, Opaque

22.7 x 15.8 mm

$ 85.91

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6.86ct Multicolor Matrix Opal, Cushion, Opaque

6.86ct Multicolor Matrix Opal, Cushion, Opaque

14.9 x 10.8 mm

$ 11.61

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21.02ct White Rainbow Moonstone, Pear Shape, Translucent

21.02ct White Rainbow Moonstone, Pear Shape, Translucent

21.2 x 14.1 mm

$ 146.55

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1.63ctw Red Rhodolite Garnet, Square, VS

1.63ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 14.26

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1.10ct Yellow Color-Change Diaspore, Cushion, VS

1.10ct Yellow Color-Change Diaspore, Cushion, VS

12.5 x 4.4 mm

$ 38.56

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0.59ct White Rainbow Moonstone, Baguette, Transparent

0.59ct White Rainbow Moonstone, Baguette, Transparent

6.2 x 4.2 mm

$ 20.57

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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 can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate
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