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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
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Yellow Untreated Gemstones
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12.86ctw Multicolor Pietersite, Round, Opaque
Pietersite Product Video (601387)

12.86ctw Multicolor Pietersite, Round, Opaque

14 mm (calibrated)

$ 56.78

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3.83ctw Brown Smoky Quartz, Round, VVS-VS

3.83ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 6.28

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7.95ct Violet Amethyst, Cushion, VVS

7.95ct Violet Amethyst, Cushion, VVS

18.3 x 9.1 mm

$ 47.51

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1.67ct Pink Strawberry Quartz, Oval, Translucent

1.67ct Pink Strawberry Quartz, Oval, Translucent

8.2 x 6.3 mm

$ 8.35

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23.92ct White Rainbow Moonstone, Pear Shape, Translucent

23.92ct White Rainbow Moonstone, Pear Shape, Translucent

30.6 x 14.5 mm

$ 166.77

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6.64ct Black Tourmaline, Emerald Cut, Opaque

6.64ct Black Tourmaline, Emerald Cut, Opaque

13.9 x 8.2 mm

$ 33.07

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27.49ct Pink Rose Quartz, Oval, Translucent

27.49ct Pink Rose Quartz, Oval, Translucent

20 x 15 mm (calibrated)

$ 36.15

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2.69ct Green Tourmaline, Emerald Cut, VVS-VS

2.69ct Green Tourmaline, Emerald Cut, VVS-VS

24.9 x 3.7 mm

$ 103.15

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1.44ct Brown Smoky Quartz, Baguette, VVS

1.44ct Brown Smoky Quartz, Baguette, VVS

9 x 6 mm (calibrated)

$ 10.04

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28.06ct Black Tourmaline, Cushion, Opaque

28.06ct Black Tourmaline, Cushion, Opaque

19.5 x 16.6 mm

$ 99.77

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1.23ct Brown Color-Change Garnet, Oval, VS

1.23ct Brown Color-Change Garnet, Oval, VS

6.8 x 5.6 mm

$ 98.26

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0.78ct Green Peridot, Oval, VVS

0.78ct Green Peridot, Oval, VVS

7 x 5 mm (calibrated)

$ 10.87

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0.71ct Orange Fire Opal, Oval, Translucent

0.71ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 16.21

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7.50ct White Quartz, Round, VVS-VS

7.50ct White Quartz, Round, VVS-VS

13 mm (calibrated)

$ 13.15

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30.03ct Multicolor Jasper, Fancy, Opaque

30.03ct Multicolor Jasper, Fancy, Opaque

30.8 x 10.4 mm

$ 9.21

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1.46ct Orange Hessonite Garnet, Oval, VS

1.46ct Orange Hessonite Garnet, Oval, VS

7.6 x 6.3 mm

$ 29.08

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27.11ct Multicolor Jasper, Fancy, Opaque

27.11ct Multicolor Jasper, Fancy, Opaque

31.6 x 10.3 mm

$ 16.33

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7.37ct Multicolor Rainbow Pyrite, Fancy, Opaque

7.37ct Multicolor Rainbow Pyrite, Fancy, Opaque

14.2 x 11.5 mm

$ 22.02

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1.19ct Yellow Sphene, Oval, Transparent

1.19ct Yellow Sphene, Oval, Transparent

6.9 x 5.5 mm

$ 5.93

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3.57ctw Red Pyrope Garnet, Oval, VVS-VS

3.57ctw Red Pyrope Garnet, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 26.08

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45.32ct Brown Tiger'S Eye Matrix, Oval, Opaque

45.32ct Brown Tiger'S Eye Matrix, Oval, Opaque

31.8 x 21.8 mm

$ 45.14

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19.79ctw Green Amazonite, Round, Opaque

19.79ctw Green Amazonite, Round, Opaque

10 mm (calibrated)

$ 15.77

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1.89ct Orange Hessonite Garnet, Oval, VS

1.89ct Orange Hessonite Garnet, Oval, VS

8.4 x 6.7 mm

$ 29.53

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1.33ct Yellow Beryl, Trillion, VS

1.33ct Yellow Beryl, Trillion, VS

8 x 8 mm (calibrated)

$ 31.79

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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

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ 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

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 -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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