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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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Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
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Yellow Untreated Gemstones
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5.71ct Multicolor Agate, Oval, Opaque

5.71ct Multicolor Agate, Oval, Opaque

15.6 x 10.9 mm

$ 4.55

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1.54ct Yellow Citrine, Round, VVS-VS

1.54ct Yellow Citrine, Round, VVS-VS

7.5 mm (calibrated)

$ 12.27

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0.91ct Green Peridot, Pear Shape, VS

0.91ct Green Peridot, Pear Shape, VS

7 x 5 mm (calibrated)

$ 6.34

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2.89ct Violet Amethyst, Trillion, VS

2.89ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 15.84

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6.20ct Green Opal, Oval, Opaque

6.20ct Green Opal, Oval, Opaque

14.7 x 11.6 mm

$ 13.28

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0.80ct Pink Morganite, Pear Shape, VVS-VS

0.80ct Pink Morganite, Pear Shape, VVS-VS

9.9 x 5 mm

$ 48.21

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4.32ct Orange Sunstone, Oval, Translucent

4.32ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 25.79

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0.05ct Black Diamond, Round, Opaque

0.05ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 14.53

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6.13ct Brown Tiger'S Eye, Baguette, Opaque

6.13ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 6.11

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0.93ct Yellow Citrine, Trillion, VVS-VS

0.93ct Yellow Citrine, Trillion, VVS-VS

7 x 7 mm (calibrated)

$ 7.41

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2.52ct Multicolor Labradorite, Marquise, Translucent

2.52ct Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 5.57

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15.33ct Yellow Rutile Quartz, Pear Shape, Transparent
Rutile Quartz Product Video (334056)

15.33ct Yellow Rutile Quartz, Pear Shape, Transparent

19.1 x 15.8 mm

$ 57.10

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0.86ct Green Peridot, Oval, VVS-VS

0.86ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 7.71

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2.33ct Orange Hessonite Garnet, Oval, VS-SI

2.33ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 45.95

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2.51ct Green Sphene, Oval, Transparent

2.51ct Green Sphene, Oval, Transparent

7.9 x 6.8 mm

$ 13.75

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1.68ct Orange Hessonite Garnet, Oval, VS-SI

1.68ct Orange Hessonite Garnet, Oval, VS-SI

7.7 x 6.6 mm

$ 27.61

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1.16ct White Sillimanite Cat'S Eye, Oval, Transparent

1.16ct White Sillimanite Cat'S Eye, Oval, Transparent

7.6 x 5.3 mm

$ 3.49

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1.71ctw Violet Amethyst, Cushion, VVS-VS

1.71ctw Violet Amethyst, Cushion, VVS-VS

7 x 5 mm (calibrated)

$ 11.92

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9.70ctw Yellow Citrine, Oval, VVS-VS

9.70ctw Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 74.39

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3.58ct Yellow Citrine, Oval, VVS-VS

3.58ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 27.46

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1.61ct Orange Hessonite Garnet, Oval, VS-SI

1.61ct Orange Hessonite Garnet, Oval, VS-SI

7.9 x 6.6 mm

$ 26.46

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1.39ctw Multicolor Opal, Oval, Translucent
Opal Product Video (548525)

1.39ctw Multicolor Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 346.11

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0.47ct Yellow Citrine, Marquise, VVS-VS
Citrine Product Video (508370)

0.47ct Yellow Citrine, Marquise, VVS-VS

8.1 x 4.2 mm

$ 2.56

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23.14ctw Multicolor Fossil Coral, Oval, Translucent

23.14ctw Multicolor Fossil Coral, Oval, Translucent

19.8 x 12.6 mm

$ 27.48

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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

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
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

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate
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