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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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1.43ct Green Peridot, Oval, VS

1.43ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 21.93

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29.28ct Multicolor Rhodochrosite, Oval, Translucent

29.28ct Multicolor Rhodochrosite, Oval, Translucent

28.3 x 16.2 mm

$ 25.66

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1.52ctw Red Rhodolite Garnet, Square, VS

1.52ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.30

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5.62ctw Yellow Citrine, Oval, Transparent

5.62ctw Yellow Citrine, Oval, Transparent

10 x 8 mm (calibrated)

$ 39.18

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1.37ct White Sillimanite Cat'S Eye, Oval, Translucent

1.37ct White Sillimanite Cat'S Eye, Oval, Translucent

7 x 5 mm (calibrated)

$ 4.12

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60.38ct Black Tourmaline, Emerald Cut, Opaque
Tourmaline Product Video (702025)

60.38ct Black Tourmaline, Emerald Cut, Opaque

40.2 x 14.4 mm

$ 300.69

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14.03ctw Black Spinel, Oval, Opaque

14.03ctw Black Spinel, Oval, Opaque

14 x 10 mm (calibrated)

$ 46.11

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7.94ct Gray Jadeite, Oval, Opaque

7.94ct Gray Jadeite, Oval, Opaque

17.2 x 10.9 mm

$ 26.10

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0.99ct Green Tourmaline, Emerald Cut, VS

0.99ct Green Tourmaline, Emerald Cut, VS

16.5 x 3 mm

$ 27.12

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2.62ctw Red Pyrope Garnet, Square, VVS-VS

2.62ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 20.09

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31.15ct Multicolor Labradorite, Round, Translucent

31.15ct Multicolor Labradorite, Round, Translucent

25.2 mm

$ 68.87

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24.19ct Bi-Color Ametrine, Oval, VS
Ametrine Product Video (605874)

24.19ct Bi-Color Ametrine, Oval, VS

23.2 x 16.1 mm

$ 185.51

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1.25ct Yellow Citrine, Emerald Cut, VVS-VS

1.25ct Yellow Citrine, Emerald Cut, VVS-VS

7.5 x 6 mm

$ 7.26

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1.14ct Yellow Beryl, Oval, VS

1.14ct Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 21.76

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0.80ct Orange Sphalerite, Trillion, VS-SI

0.80ct Orange Sphalerite, Trillion, VS-SI

5.7 x 5.5 mm

$ 39.84

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6.75ct Multicolor Fire Agate, Fancy, Opaque

6.75ct Multicolor Fire Agate, Fancy, Opaque

13 x 10.7 mm

$ 52.73

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36.22ctw Multicolor Fossil Coral, Cushion, Translucent

36.22ctw Multicolor Fossil Coral, Cushion, Translucent

21.7 x 14.6 mm

$ 46.82

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1.85ct Orange Hessonite Garnet, Oval, VS-SI

1.85ct Orange Hessonite Garnet, Oval, VS-SI

8.4 x 7 mm

$ 36.85

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1.74ct Orange Hessonite Garnet, Cushion, VS-SI

1.74ct Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 34.66

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3.32ct Yellow Citrine, Oval, VVS-VS

3.32ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 20.30

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0.74ct Multicolor Opal, Pear Shape, Transparent

0.74ct Multicolor Opal, Pear Shape, Transparent

8 x 6 mm (calibrated)

$ 18.43

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86.71ct Pink Tourmaline, Fancy, Transparent
Tourmaline Product Video (666912)

86.71ct Pink Tourmaline, Fancy, Transparent

55.7 x 38 mm

$ 1,295.45

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1.42ct Multicolor Opal, Oval, Transparent

1.42ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 55.01

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3.61ct Pink Tourmaline, Emerald Cut, VS

3.61ct Pink Tourmaline, Emerald Cut, VS

10.9 x 7 mm

$ 177.99

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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 -> 8 star ratings

Good prices

Posted By TRM in October, 2025
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Everything was good, the purchase was what I expected and what they show is what you get.

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Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
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Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
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Overall Rating -> 10 star ratings

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
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Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate
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