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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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1.59ct Multicolor Opal, Oval, Transparent

10.6 x 7.9 mm

$ 39.59

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14.90ct Green Uvarovite Garnet Drusy, Fancy, Opaque

16 x 16 mm (calibrated)

$ 22.26

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1.91ct White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 32.51

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1.37ct Orange Sphalerite, Round, VS-SI

6.5 mm (calibrated)

$ 68.23

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24.93ctw Multicolor Fossil Coral, Fancy, Opaque

18.6 x 12.1 mm

$ 27.31

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8.83ct Green Bloodstone, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 33.86

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18.76ct Violet Amethyst, Cushion, VS

20 x 15 mm (calibrated)

$ 130.79

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2.23ct Yellow Apatite, Emerald Cut, VS

7.8 x 7.7 mm

$ 114.83

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3.49ct White Topaz, Round, VS-SI

8.5 mm (calibrated)

$ 22.94

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2.98ct Red Almandine Garnet, Pear Shape, VS

12 x 8 mm (calibrated)

$ 111.30

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2.74ct Pink Morganite, Pear Shape, Transparent

14 x 9 mm (calibrated)

$ 28.63

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1.82ct Green Tourmaline, Emerald Cut, VVS

16 x 3.8 mm

$ 59.82

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16.79ct Violet Amethyst, Pear Shape, VVS-VS

21.2 x 15.8 mm

$ 117.06

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3.99ctw Yellow Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 7.98

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1.03ctw White Rainbow Moonstone, Oval, Transparent

6 x 4 mm (calibrated)

$ 32.83

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3.30ctw Brown Tiger'S Eye, Oval, Opaque

9 x 7 mm (calibrated)

$ 3.29

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0.64ct Multicolor Opal, Pear Shape, Transparent

7.3 x 5.2 mm

$ 15.94

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4.29ct Brown Rutile Topaz, Heart, Transparent

9.6 x 9.4 mm

$ 89.02

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1.60ct Pink Tourmaline, Oval, Transparent

7.9 x 6.3 mm

$ 47.81

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2.98ct Red Almandine Garnet, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 103.88

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5.25ct Violet Amethyst, Pear Shape, VVS-VS

14 x 10 mm (calibrated)

$ 34.51

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1.79ct Yellow Citrine, Baguette, VS

9.8 x 5.2 mm

$ 13.73

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30.12ct Yellow Obsidian, Pear Shape, Opaque

33.7 x 23.7 mm

$ 33.00

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2.90ct Brown Rutile Topaz, Pear Shape, Transparent

11.6 x 8.5 mm

$ 60.18

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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

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 -> 9 star ratings

Fast and reliable service.

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

Very neat and to the point

Posted By Botha in March, 2026
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Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
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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
Source: Bizrate
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