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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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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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7.79ct Yellow Rutile Quartz, Round, Transparent

7.79ct Yellow Rutile Quartz, Round, Transparent

13 mm (calibrated)

$ 21.17

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1.09ct Multicolor Opal, Oval, Translucent

1.09ct Multicolor Opal, Oval, Translucent

10 x 7 mm (calibrated)

$ 35.82

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63.72ct Multicolor Jasper, Baguette, Opaque

63.72ct Multicolor Jasper, Baguette, Opaque

33.8 x 26 mm

$ 44.42

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2.38ctw Green Peridot, Round, VVS-VS

2.38ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 39.11

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4.36ctw Red Almandine Garnet, Oval, VVS-VS

4.36ctw Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 162.85

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2.94ct Violet Amethyst, Trillion, VS

2.94ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 22.55

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1.31ctw Red Pyrope Garnet, Heart, VVS-VS

1.31ctw Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 10.05

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4.57ct Multicolor Fire Agate, Fancy, Opaque

4.57ct Multicolor Fire Agate, Fancy, Opaque

10.9 x 9.9 mm

$ 35.14

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0.56ct Green Peridot, Emerald Cut, VS

0.56ct Green Peridot, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 8.37

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2.94ct Violet Amethyst, Trillion, VVS-VS

2.94ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.32

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3.75ct Multicolor Labradorite, Pear Shape, Translucent

3.75ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 8.30

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5.51ct Brown Smoky Quartz, Emerald Cut, VVS-VS

5.51ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 10.1 mm

$ 24.14

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6.66ct Pink Kunzite, Emerald Cut, VS

6.66ct Pink Kunzite, Emerald Cut, VS

11.3 x 7.7 mm

$ 165.83

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7.12ctw Violet Amethyst, Oval, Transparent

7.12ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 39.00

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2.37ct Red Tourmaline, Heart, VS-SI
Tourmaline Product Video (747439)

2.37ct Red Tourmaline, Heart, VS-SI

9.6 x 7.9 mm

$ 354.08

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0.98ct Yellow Color-Change Diaspore, Marquise, VS

0.98ct Yellow Color-Change Diaspore, Marquise, VS

10.9 x 4.6 mm

$ 52.04

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5.21ct Blue Chalcedony, Cushion, Translucent

5.21ct Blue Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 19.46

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23.29ct Multicolor Quartz With Marcasite, Oval, Transparent

23.29ct Multicolor Quartz With Marcasite, Oval, Transparent

23.8 x 17.1 mm

$ 149.01

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3.03ct Yellow Citrine, Oval, VVS

3.03ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 23.29

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20.05ct White Agate, Oval, Opaque

20.05ct White Agate, Oval, Opaque

21.4 x 17.6 mm

$ 31.76

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21.47ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (371434)

21.47ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 94.09

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8.74ct Turquoise Aquamarine, Pear Shape, Translucent

8.74ct Turquoise Aquamarine, Pear Shape, Translucent

19.3 x 13.3 mm

$ 181.36

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6.18ct Yellow Apatite, Oval, VS
Apatite Product Video (514430)

6.18ct Yellow Apatite, Oval, VS

12.6 x 10.7 mm

$ 270.83

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0.57ct Orange Sphalerite, Round, SI-I1

0.57ct Orange Sphalerite, Round, SI-I1

4.7 mm

$ 28.39

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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

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

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
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 -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate
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