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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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1.75ct Orange Hessonite Garnet, Oval, VS

1.75ct Orange Hessonite Garnet, Oval, VS

8.1 x 6.7 mm

$ 38.35

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20.68ct Multicolor Jasper, Fancy, Opaque

20.68ct Multicolor Jasper, Fancy, Opaque

27.5 x 14.9 mm

$ 12.46

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25.23ctw Multicolor Fossil Coral, Cushion, Opaque

25.23ctw Multicolor Fossil Coral, Cushion, Opaque

19.1 x 13.8 mm

$ 32.62

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1.20ct Orange Sunstone, Oval, Translucent

1.20ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.97

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1.36ct Green Tourmaline, Emerald Cut, VVS-VS

1.36ct Green Tourmaline, Emerald Cut, VVS-VS

17.9 x 3.1 mm

$ 32.78

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4.28ctw Red Pyrope Garnet, Marquise, VVS-VS

4.28ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6.1 mm

$ 47.03

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1.69ct Multicolor Opal, Oval, Transparent

1.69ct Multicolor Opal, Oval, Transparent

11.1 x 8.4 mm

$ 77.77

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0.60ct Green Peridot, Marquise, VS

0.60ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.96

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5.51ct Multicolor Labradorite, Marquise, Translucent

5.51ct Multicolor Labradorite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 12.18

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4.36ct Violet Amethyst, Fancy, VVS-VS

4.36ct Violet Amethyst, Fancy, VVS-VS

11.5 x 10 mm

$ 28.95

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3.96ct Multicolor Opal, Oval, Translucent

3.96ct Multicolor Opal, Oval, Translucent

13 x 9 mm (calibrated)

$ 87.48

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3.76ct Pink Rose Quartz, Emerald Cut, Transparent

3.76ct Pink Rose Quartz, Emerald Cut, Transparent

10 x 10 mm (calibrated)

$ 20.60

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9.66ct Green Jadeite, Oval, Translucent

9.66ct Green Jadeite, Oval, Translucent

17.2 x 14 mm

$ 31.76

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14.37ct Gray Hematite, Pear Shape, Opaque

14.37ct Gray Hematite, Pear Shape, Opaque

16.4 x 10.2 mm

$ 14.01

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14.47ct Turquoise Grandidierite, Oval, Translucent
Grandidierite Product Video (548257)

14.47ct Turquoise Grandidierite, Oval, Translucent

16.5 x 12.7 mm

$ 475.60

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1.74ct Yellow Citrine, Trillion, VVS

1.74ct Yellow Citrine, Trillion, VVS

9 x 9 mm (calibrated)

$ 11.44

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6.02ct Brown Tiger'S Eye, Baguette, Opaque

6.02ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 3.30

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35.81ct Green Amazonite, Oval, Opaque

35.81ct Green Amazonite, Oval, Opaque

31.1 x 21.3 mm

$ 28.54

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20.54ct Multicolor Opal, Oval, Transparent

20.54ct Multicolor Opal, Oval, Transparent

21.1 x 17.9 mm

$ 1,022.89

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5.84ct Violet Amethyst, Pear Shape, VS

5.84ct Violet Amethyst, Pear Shape, VS

16 x 12 mm (calibrated)

$ 44.79

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2.82ct Violet Amethyst, Trillion, VS

2.82ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.62

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1.02ct White Cat'S Eye Moonstone, Oval, Translucent

1.02ct White Cat'S Eye Moonstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 30.12

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3.48ct Pink Strawberry Quartz, Oval, Transparent

3.48ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 26.10

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2.06ct Violet Amethyst, Emerald Cut, VS

2.06ct Violet Amethyst, Emerald Cut, VS

9 x 7 mm (calibrated)

$ 13.55

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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 -> 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

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 have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate
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