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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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7.81ct Brown Smoky Quartz, Emerald Cut, VVS

7.81ct Brown Smoky Quartz, Emerald Cut, VVS

12 x 12 mm (calibrated)

$ 15.32

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4.57ct Violet Amethyst, Heart, Transparent

4.57ct Violet Amethyst, Heart, Transparent

11.3 x 9.7 mm

$ 22.76

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2.07ct Orange Moonstone, Trillion, Translucent

2.07ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 4.13

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14.55ct White Rainbow Moonstone, Pear Shape, Transparent

14.55ct White Rainbow Moonstone, Pear Shape, Transparent

20 x 15 mm (calibrated)

$ 115.93

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0.03ct White Diamond, Round, VVS

0.03ct White Diamond, Round, VVS

2 mm (calibrated)

$ 68.48

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10.77ct Black Nuummite, Oval, Opaque

10.77ct Black Nuummite, Oval, Opaque

18.8 x 11.6 mm

$ 47.31

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26.22ct Multicolor Lepidolite, Pear Shape, Opaque

26.22ct Multicolor Lepidolite, Pear Shape, Opaque

34.7 x 24.1 mm

$ 13.06

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1.56ctw Violet Amethyst, Marquise, VVS-VS

1.56ctw Violet Amethyst, Marquise, VVS-VS

10 x 5 mm (calibrated)

$ 10.36

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3.73ct Yellow Citrine, Pear Shape, VVS-VS

3.73ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 23.41

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1.79ct Multicolor Labradorite, Pear Shape, Translucent

1.79ct Multicolor Labradorite, Pear Shape, Translucent

8.6 x 6.8 mm

$ 3.95

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14.09ct Multicolor Quartz With Marcasite, Fancy, Transparent

14.09ct Multicolor Quartz With Marcasite, Fancy, Transparent

22.9 x 13.5 mm

$ 64.33

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11.01ct Black Tourmaline, Emerald Cut, Opaque

11.01ct Black Tourmaline, Emerald Cut, Opaque

15 x 10 mm (calibrated)

$ 54.83

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1.21ct Red Rhodolite Garnet, Oval, VS

1.21ct Red Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 32.14

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9.60ct Multicolor Coral, Pear Shape, Translucent
Coral Product Video (492069)

9.60ct Multicolor Coral, Pear Shape, Translucent

18.8 x 13.8 mm

$ 29.98

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2.17ct Yellow Citrine, Pear Shape, VS

2.17ct Yellow Citrine, Pear Shape, VS

10.8 x 7.5 mm

$ 16.64

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22.51ct Brown Moonstone, Oval, Translucent

22.51ct Brown Moonstone, Oval, Translucent

20 x 15 mm (calibrated)

$ 29.59

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1.74ctw Red Pyrope Garnet, Heart, VVS-VS

1.74ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 13.35

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4.04ctw Green Prehnite, Oval, Transparent

4.04ctw Green Prehnite, Oval, Transparent

8.1 x 7.1 mm

$ 25.98

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1.10ct Purple Spinel, Cushion, VS
Spinel Product Video (720157)

1.10ct Purple Spinel, Cushion, VS

6 x 5.7 mm

$ 164.34

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11.35ctw White Topaz, Oval, VVS-VS

11.35ctw White Topaz, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 75.36

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3.22ctw White Topaz, Cushion, VVS-VS

3.22ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 17.64

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8.05ctw White Topaz, Square, VVS-VS
Topaz Product Video (341515)

8.05ctw White Topaz, Square, VVS-VS

5 x 5 mm (calibrated)

$ 64.83

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1.88ct Violet Amethyst, Emerald Cut, VVS-VS

1.88ct Violet Amethyst, Emerald Cut, VVS-VS

9 x 7 mm (calibrated)

$ 12.36

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1.29ct Green Tourmaline, Emerald Cut, VVS-VS

1.29ct Green Tourmaline, Emerald Cut, VVS-VS

21.6 x 2.9 mm

$ 31.09

View Gem
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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 -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

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
Source: Bizrate

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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