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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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0.89ct Green Peridot, Oval, VVS-VS

0.89ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 12.41

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7.08ct Multicolor Pietersite, Round, Opaque

7.08ct Multicolor Pietersite, Round, Opaque

14 mm (calibrated)

$ 16.72

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4.31ct Black Star Diopside, Oval, Opaque

4.31ct Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 21.46

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1.49ctw Green Peridot, Oval, VS

1.49ctw Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 20.77

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1.00ctw Green Peridot, Oval, VS

1.00ctw Green Peridot, Oval, VS

6 x 4 mm (calibrated)

$ 10.96

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2.90ct Violet Amethyst, Trillion, VVS

2.90ct Violet Amethyst, Trillion, VVS

10 x 10 mm (calibrated)

$ 20.22

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7.05ct Violet Amethyst, Pear Shape, VVS-VS

7.05ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 54.07

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 10.27

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6.07ct Brown Smoky Quartz, Round, VVS

6.07ct Brown Smoky Quartz, Round, VVS

13 mm (calibrated)

$ 11.91

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6.08ctw Brown Tiger'S Eye, Oval, Opaque

6.08ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 6.06

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0.57ct Multicolor Labradorite, Pear Shape, Translucent

0.57ct Multicolor Labradorite, Pear Shape, Translucent

6.3 x 4.1 mm

$ 1.26

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16.89ct Multicolor Labradorite, Oval, Opaque

16.89ct Multicolor Labradorite, Oval, Opaque

22.4 x 16.1 mm

$ 15.14

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2.76ct Yellow Citrine, Square, VS

2.76ct Yellow Citrine, Square, VS

9 x 9 mm (calibrated)

$ 18.14

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0.81ct Yellow Color-Change Diaspore, Cushion, VVS

0.81ct Yellow Color-Change Diaspore, Cushion, VVS

7 x 5 mm (calibrated)

$ 33.47

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1.53ct Yellow Citrine, Round, VVS

1.53ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.19

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1.50ct Yellow Beryl, Oval, VVS-VS

1.50ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 37.35

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2.09ct Violet Amethyst, Marquise, VVS

2.09ct Violet Amethyst, Marquise, VVS

20.3 x 5.1 mm

$ 14.57

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7.63ct Turquoise Larimar, Oval, Opaque

7.63ct Turquoise Larimar, Oval, Opaque

15 x 10 mm (calibrated)

$ 98.70

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16.57ct Multicolor Jasper, Marquise, Opaque
Jasper Product Video (399401)

16.57ct Multicolor Jasper, Marquise, Opaque

34.2 x 13.3 mm

$ 28.88

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2.52ct Pink Strawberry Quartz, Oval, Transparent

2.52ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 18.72

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27.12ct Gray Hematite, Pear Shape, Opaque

27.12ct Gray Hematite, Pear Shape, Opaque

25 x 16.5 mm

$ 27.34

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36.38ct Multicolor Jasper, Oval, Opaque

36.38ct Multicolor Jasper, Oval, Opaque

33 x 25.2 mm

$ 17.94

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39.36ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

39.36ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

32.5 x 18.8 mm

$ 17.64

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0.89ct Violet Amethyst, Marquise, VS

0.89ct Violet Amethyst, Marquise, VS

10 x 5 mm (calibrated)

$ 5.91

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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

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

Overall Rating -> 10 star ratings

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 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

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
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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