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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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Yellow Untreated Gemstones
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0.85ctw Green Peridot, Pear Shape, VVS-VS

0.85ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 7.45

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1.38ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

1.38ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 27.21

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2.25ct Orange Spessartite Garnet, Trillion, VVS-VS
Spessartite Garnet Product Video (714467)

2.25ct Orange Spessartite Garnet, Trillion, VVS-VS

7 x 7 mm (calibrated)

$ 541.58

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6.41ct Violet Amethyst, Pear Shape, VS

6.41ct Violet Amethyst, Pear Shape, VS

15 x 10 mm (calibrated)

$ 42.14

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3.05ct Yellow Color-Change Diaspore, Cushion, VVS-VS
Color-Change Diaspore Product Video (400535)

3.05ct Yellow Color-Change Diaspore, Cushion, VVS-VS

15.3 x 4.8 mm

$ 835.40

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7.46ct Brown Smoky Quartz, Round, VVS-VS

7.46ct Brown Smoky Quartz, Round, VVS-VS

13 mm (calibrated)

$ 12.26

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39.39ct Green Amazonite, Fancy, Opaque

39.39ct Green Amazonite, Fancy, Opaque

40.5 x 11.6 mm

$ 7.85

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4.79ct Yellow Citrine, Oval, VVS

4.79ct Yellow Citrine, Oval, VVS

14 x 10 mm (calibrated)

$ 33.40

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6.22ct Violet Amethyst, Pear Shape, Transparent

6.22ct Violet Amethyst, Pear Shape, Transparent

16.4 x 9.5 mm

$ 37.17

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2.83ct Violet Amethyst, Trillion, VS

2.83ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 18.09

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39.86ct Multicolor Jasper, Fancy, Translucent

39.86ct Multicolor Jasper, Fancy, Translucent

47.3 x 25.6 mm

$ 31.44

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8.87ctw Pink Strawberry Quartz, Oval, Transparent

8.87ctw Pink Strawberry Quartz, Oval, Transparent

11.1 x 9.9 mm

$ 46.82

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1.05ct Violet Spinel, Baguette, VS

1.05ct Violet Spinel, Baguette, VS

7.6 x 4.9 mm

$ 37.55

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1.03ct Orange Hessonite Garnet, Round, VS

1.03ct Orange Hessonite Garnet, Round, VS

6 mm (calibrated)

$ 17.45

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3.30ctw Yellow Citrine, Round, VVS

3.30ctw Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 23.01

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6.66ctw Pink Strawberry Quartz, Oval, Translucent

6.66ctw Pink Strawberry Quartz, Oval, Translucent

11 x 9 mm (calibrated)

$ 52.03

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0.49ct Green Peridot, Oval, VS
Peridot Product Video (541070)

0.49ct Green Peridot, Oval, VS

6 x 4 mm (calibrated)

$ 3.10

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0.58ct Pink Spinel, Oval, VS
Spinel Product Video (714549)

0.58ct Pink Spinel, Oval, VS

4.6 x 4 mm

$ 962.80

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1.77ct Brown Tiger'S Eye, Baguette, Opaque

1.77ct Brown Tiger'S Eye, Baguette, Opaque

8 x 6 mm (calibrated)

$ 1.47

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16.27ctw Brown Tiger'S Eye, Oval, Opaque

16.27ctw Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 24.31

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3.43ct Yellow Cat'S Eye Opal, Oval, Opaque

3.43ct Yellow Cat'S Eye Opal, Oval, Opaque

10.4 x 8.6 mm

$ 10.25

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1.24ct Purple Spinel, Cushion, VS

1.24ct Purple Spinel, Cushion, VS

7 x 5.8 mm

$ 148.20

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1.29ct Violet Spinel, Cushion, VVS-VS

1.29ct Violet Spinel, Cushion, VVS-VS

6.7 x 5.5 mm

$ 84.80

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8.83ct Pink Strawberry Quartz, Oval, Translucent

8.83ct Pink Strawberry Quartz, Oval, Translucent

16 x 12 mm (calibrated)

$ 53.02

View Gem
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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

Very good. I have made several purchases as a collector over the years, and have never been dissapointed in the selection, process, or delivery.

Posted By Schmoove in August, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

There is NOPLACE else I'd rather buy gemstones. Every single aspect exceeds expectations

Posted By Tabsatx in August, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

Could not get it to work 25 times.

Posted By Dock in July, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate
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