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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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0.86ct Pink Malaya Garnet, Round, VS

5.5 mm (calibrated)

$ 37.69

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1.71ct Multicolor Pietersite, Round, Opaque

8 mm (calibrated)

$ 4.03

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33.79ct Gray Hematite, Pear Shape, Opaque

23.5 x 16.4 mm

$ 34.06

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20.35ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

24.9 x 14.7 mm

$ 9.12

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4.08ct Brown Smoky Quartz, Round, VVS-VS

11 mm (calibrated)

$ 6.71

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16.49ct Multicolor Agate, Fancy, Opaque

19.2 x 9.1 mm

$ 28.88

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4.04ct Red Almandine Garnet, Oval, VVS

11 x 9 mm (calibrated)

$ 140.83

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4.92ctw White Topaz, Square, VS

4 x 4 mm (calibrated)

$ 37.73

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1.98ct Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 13.75

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1.59ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 11.09

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31.44ct Gray Hematite, Oval, Opaque

21.5 x 16.1 mm

$ 30.66

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19.85ct Multicolor Ruby-Zoisite, Baguette, Opaque

22.3 x 12.2 mm

$ 35.46

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3.67ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 28.15

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1.82ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 9.10

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13.78ct Violet Amethyst, Round, VVS

16 mm (calibrated)

$ 109.80

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1.07ctw Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 8.52

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1.56ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 12.43

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0.25ct Green Tsavorite Garnet, Oval, VVS-VS

5 x 3 mm (calibrated)

$ 12.45

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16.58ctw Green Aventurine, Pear Shape, Translucent

20.5 x 12.2 mm

$ 36.34

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2.08ct Orange Hessonite Garnet, Cushion, SI

7 x 7 mm (calibrated)

$ 41.02

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1.13ct Yellow Beryl, Cushion, VS

8 x 6 mm (calibrated)

$ 27.01

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0.76ct Green Tourmaline, Emerald Cut, VVS-VS

11.5 x 3.7 mm

$ 24.98

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4.41ct Violet Amethyst, Round, VVS

11 mm (calibrated)

$ 28.99

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1.82ct Green Tourmaline, Emerald Cut, VVS

18.3 x 3.5 mm

$ 59.82

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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

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
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

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
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 -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate
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