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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
Untreated Gemstones Price
Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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1.60ct Orange Zircon, Round, VVS-VS

1.60ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 35.06

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2.96ct Yellow Citrine, Oval, VVS-VS

2.96ct Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 16.22

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31.90ctw Brown Smoky Quartz, Fancy, Transparent

31.90ctw Brown Smoky Quartz, Fancy, Transparent

32.3 x 15.1 mm

$ 52.41

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28.65ctw Multicolor Fossil Coral, Cushion, Opaque

28.65ctw Multicolor Fossil Coral, Cushion, Opaque

20.4 x 14.1 mm

$ 35.79

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8.71ct Green Tsavorite Garnet, Pear Shape, Opaque
Tsavorite Garnet Product Video (521332)

8.71ct Green Tsavorite Garnet, Pear Shape, Opaque

14 x 10 mm (calibrated)

$ 190.85

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1.40ctw White Sillimanite Cat'S Eye, Oval, Transparent

1.40ctw White Sillimanite Cat'S Eye, Oval, Transparent

6.3 x 4.1 mm

$ 5.58

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1.50ct Yellow Sphene, Oval, Translucent

1.50ct Yellow Sphene, Oval, Translucent

6.9 x 5.8 mm

$ 7.47

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4.97ct Black Star Diopside, Oval, Opaque

4.97ct Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 24.75

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2.50ctw Violet Amethyst, Oval, VVS-VS
Amethyst Product Video (430834)

2.50ctw Violet Amethyst, Oval, VVS-VS

6.2 x 4.2 mm

$ 13.70

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0.57ct Orange Clinohumite, Oval, SI

0.57ct Orange Clinohumite, Oval, SI

6.5 x 4.5 mm

$ 28.39

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25.29ctw Multicolor Fossil Coral, Fancy, Opaque

25.29ctw Multicolor Fossil Coral, Fancy, Opaque

20.3 x 12.1 mm

$ 32.69

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1.15ct Pink Strawberry Quartz, Oval, Transparent

1.15ct Pink Strawberry Quartz, Oval, Transparent

7 x 5 mm (calibrated)

$ 5.74

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1.68ct Yellow Beryl, Oval, VVS

1.68ct Yellow Beryl, Oval, VVS

9 x 7 mm (calibrated)

$ 33.47

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3.52ct Yellow Citrine, Oval, VVS-VS

3.52ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 23.14

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2.12ct Yellow Citrine, Oval, VVS-VS

2.12ct Yellow Citrine, Oval, VVS-VS

9.2 x 7.3 mm

$ 16.28

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2.86ct Yellow Citrine, Emerald Cut, VVS

2.86ct Yellow Citrine, Emerald Cut, VVS

9.6 x 9.5 mm

$ 15.67

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7.27ctw Violet Amethyst, Oval, Transparent

7.27ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 39.83

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2.95ct Yellow Citrine, Cushion, VVS-VS

2.95ct Yellow Citrine, Cushion, VVS-VS

10.9 x 8.5 mm

$ 22.63

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39.08ct Yellow Calcite, Oval, Translucent

39.08ct Yellow Calcite, Oval, Translucent

39.2 x 20.2 mm

$ 26.86

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3.52ct White Topaz, Round, VVS-VS

3.52ct White Topaz, Round, VVS-VS

9.5 mm (calibrated)

$ 30.98

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0.48ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.48ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.6 x 4.2 mm

$ 79.68

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5.38ctw Purple Rhodolite Garnet, Oval, VS
Rhodolite Garnet Product Video (377679)

5.38ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 114.41

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8.81ctw Green Prehnite, Fancy, Translucent

8.81ctw Green Prehnite, Fancy, Translucent

14 x 10.2 mm

$ 14.48

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1.40ct Brown Kornerupine, Baguette, VVS-VS

1.40ct Brown Kornerupine, Baguette, VVS-VS

7.7 x 4.7 mm

$ 63.91

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 -> 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

Will know more once order received

Posted By Jim in September, 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 -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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