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Home › Gemstones › Untreated Gemstones

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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Yellow Untreated Gemstones
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11.23ct Blue Hemimorphite, Oval, Opaque
Hemimorphite Product Video (749641)

11.23ct Blue Hemimorphite, Oval, Opaque

15.9 x 11 mm

$ 326.23

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15.23ct White Rainbow Moonstone, Fancy, Transparent
Rainbow Moonstone Product Video (668812)

15.23ct White Rainbow Moonstone, Fancy, Transparent

15 x 15 mm (calibrated)

$ 273.05

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29.35ctw Multicolor Jasper, Pear Shape, Opaque

29.35ctw Multicolor Jasper, Pear Shape, Opaque

34.8 x 13.7 mm

$ 46.63

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12.72ctw Violet Amethyst, Oval, Transparent

12.72ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 69.68

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0.35ct Yellow Citrine, Heart, VVS

0.35ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 2.79

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0.90ct Green Tourmaline, Baguette, VVS

0.90ct Green Tourmaline, Baguette, VVS

6.4 x 4.1 mm

$ 31.37

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79.99ct Brown Tiger'S Eye, Oval, Opaque

79.99ct Brown Tiger'S Eye, Oval, Opaque

40.9 x 28.1 mm

$ 36.81

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4.27ctw Red Pyrope Garnet, Square, VVS-VS

4.27ctw Red Pyrope Garnet, Square, VVS-VS

7 x 7 mm (calibrated)

$ 37.43

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2.37ct Orange Hessonite Garnet, Oval, VS-SI

2.37ct Orange Hessonite Garnet, Oval, VS-SI

9.4 x 7.3 mm

$ 38.95

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6.38ctw Violet Amethyst, Oval, Transparent

6.38ctw Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 34.95

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0.94ct Green Peridot, Oval, VVS-VS

0.94ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 6.56

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2.48ct Yellow Citrine, Oval, VVS

2.48ct Yellow Citrine, Oval, VVS

14.2 x 7 mm

$ 17.29

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0.82ct Gray Sillimanite Cat'S Eye, Oval, Transparent

0.82ct Gray Sillimanite Cat'S Eye, Oval, Transparent

6.6 x 4.5 mm

$ 2.70

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0.98ct Pink Morganite, Pear Shape, VVS-VS

0.98ct Pink Morganite, Pear Shape, VVS-VS

10.1 x 5.2 mm

$ 59.05

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1.65ct Brown Kornerupine, Pear Shape, VVS
Kornerupine Product Video (380740)

1.65ct Brown Kornerupine, Pear Shape, VVS

9.2 x 5.8 mm

$ 136.95

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26.52ct Yellow Obsidian, Oval, Opaque

26.52ct Yellow Obsidian, Oval, Opaque

30 x 20.9 mm

$ 29.05

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1.39ct Green Tourmaline, Oval, VS

1.39ct Green Tourmaline, Oval, VS

8 x 6 mm (calibrated)

$ 193.82

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1.62ct Multicolor Labradorite, Round, Translucent

1.62ct Multicolor Labradorite, Round, Translucent

8 mm (calibrated)

$ 3.49

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1.25ct Brown Color-Change Garnet, Oval, VS

1.25ct Brown Color-Change Garnet, Oval, VS

7.3 x 5.6 mm

$ 99.86

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2.94ctw Red Pyrope Garnet, Emerald Cut, VS

2.94ctw Red Pyrope Garnet, Emerald Cut, VS

5.7 x 3.9 mm

$ 22.55

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6.28ct Turquoise Larimar, Oval, Opaque

6.28ct Turquoise Larimar, Oval, Opaque

14.7 x 11.5 mm

$ 74.46

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6.70ct Pink Kunzite, Oval, VS

6.70ct Pink Kunzite, Oval, VS

10.9 x 9.5 mm

$ 166.83

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1.45ct Brown Sillimanite Cat'S Eye, Oval, Transparent

1.45ct Brown Sillimanite Cat'S Eye, Oval, Transparent

6.6 x 6.4 mm

$ 4.33

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1.14ct White Rainbow Moonstone, Oval, Transparent

1.14ct White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 37.48

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

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
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Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
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Overall Rating -> 10 star ratings

There is NOPLACE else I'd rather buy gemstones. Every single aspect exceeds expectations

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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 -> 10 star ratings

Very good. I have made several purchases as a collector over the years, and have never been dissapointed in the selection, process, or delivery.

Posted By Schmoove in August, 2026
Source: Bizrate
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