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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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0.94ct Orange Moonstone, Pear Shape, Transparent

0.94ct Orange Moonstone, Pear Shape, Transparent

9 x 6 mm (calibrated)

$ 1.88

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0.54ctw Blue Kyanite, Round, VS-SI

0.54ctw Blue Kyanite, Round, VS-SI

3.8 mm

$ 9.68

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1.17ct Orange Fire Opal, Oval, Transparent

1.17ct Orange Fire Opal, Oval, Transparent

9.5 x 6.9 mm

$ 40.79

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0.40ct Green Sphene, Round, VS

0.40ct Green Sphene, Round, VS

4.5 mm (calibrated)

$ 14.61

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3.20ct Yellow Citrine, Oval, VS

3.20ct Yellow Citrine, Oval, VS

10.9 x 7.8 mm

$ 21.03

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1.78ct Brown Tiger'S Eye, Oval, Opaque

1.78ct Brown Tiger'S Eye, Oval, Opaque

9 x 7 mm (calibrated)

$ 1.78

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1.48ctw Green Demantoid Garnet, Oval, VS

1.48ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 162.15

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5.95ct Yellow Citrine, Oval, VVS

5.95ct Yellow Citrine, Oval, VVS

14.3 x 10.5 mm

$ 45.63

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23.66ct Violet Amethyst, Round, VVS-VS

23.66ct Violet Amethyst, Round, VVS-VS

20 mm (calibrated)

$ 164.95

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11.12ct Brown Tiger'S Eye, Fancy, Opaque

11.12ct Brown Tiger'S Eye, Fancy, Opaque

16 x 16 mm (calibrated)

$ 14.61

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1.76ct Orange Zircon, Round, VVS-VS

1.76ct Orange Zircon, Round, VVS-VS

7 mm (calibrated)

$ 32.14

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4.36ctw Multicolor Labradorite, Round, Translucent

4.36ctw Multicolor Labradorite, Round, Translucent

8 mm (calibrated)

$ 7.64

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6.92ct Green Prehnite, Fancy, Transparent

6.92ct Green Prehnite, Fancy, Transparent

17.6 x 11.4 mm

$ 8.03

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7.00ct Black Tourmaline, Emerald Cut, Opaque

7.00ct Black Tourmaline, Emerald Cut, Opaque

16.2 x 7.4 mm

$ 34.86

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0.91ct Yellow Zircon, Oval, VVS

0.91ct Yellow Zircon, Oval, VVS

6 x 4.7 mm

$ 13.60

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3.41ctw Red Pyrope Garnet, Square, VS

3.41ctw Red Pyrope Garnet, Square, VS

3.9 x 3.8 mm

$ 26.15

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3.04ct Violet Amethyst, Trillion, VS

3.04ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 22.78

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30.89ct Violet Charoite, Round, Opaque

30.89ct Violet Charoite, Round, Opaque

26.7 mm

$ 51.08

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0.68ct Yellow Color-Change Diaspore, Round, VS

0.68ct Yellow Color-Change Diaspore, Round, VS

5.5 mm (calibrated)

$ 23.87

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16.46ct Green Jadeite, Oval, Translucent

16.46ct Green Jadeite, Oval, Translucent

20.7 x 16.8 mm

$ 54.10

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23.87ct White Howlite, Oval, Opaque

23.87ct White Howlite, Oval, Opaque

27 x 20 mm (calibrated)

$ 11.89

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1.82ct Turquoise Grandidierite, Oval, Translucent

1.82ct Turquoise Grandidierite, Oval, Translucent

8.6 x 6.5 mm

$ 52.40

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1.60ct Green Tourmaline, Emerald Cut, VVS

1.60ct Green Tourmaline, Emerald Cut, VVS

14.3 x 3.8 mm

$ 34.97

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0.41ct Yellow Color-Change Diaspore, Oval, VS

0.41ct Yellow Color-Change Diaspore, Oval, VS

5 x 4 mm (calibrated)

$ 21.65

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

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 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 -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate
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