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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
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25.54ctw Brown Tiger'S Eye, Fancy, Opaque

25.54ctw Brown Tiger'S Eye, Fancy, Opaque

16 x 16 mm (calibrated)

$ 27.98

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5.64ctw Violet Amethyst, Oval, Transparent

5.64ctw Violet Amethyst, Oval, Transparent

10 x 8 mm (calibrated)

$ 30.89

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0.56ct Purple Spinel, Round, VS

0.56ct Purple Spinel, Round, VS

5 mm (calibrated)

$ 29.37

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1.60ct Multicolor Opal, Oval, Transparent

1.60ct Multicolor Opal, Oval, Transparent

10.2 x 7.5 mm

$ 66.93

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0.50ct Yellow Citrine, Trillion, VVS-VS

0.50ct Yellow Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 4.15

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1.24ct Yellow Citrine, Heart, VS

1.24ct Yellow Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 9.51

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1.28ct Pink Morganite, Pear Shape, VVS-VS

1.28ct Pink Morganite, Pear Shape, VVS-VS

8.6 x 6.3 mm

$ 56.09

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12.69ct Violet Amethyst, Cushion, VVS

12.69ct Violet Amethyst, Cushion, VVS

15 x 15 mm (calibrated)

$ 88.48

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1.28ct Green Tourmaline, Emerald Cut, VVS-VS

1.28ct Green Tourmaline, Emerald Cut, VVS-VS

12.4 x 3.8 mm

$ 34.92

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2.81ct Violet Amethyst, Trillion, VS

2.81ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 15.40

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0.78ct Yellow Color-Change Diaspore, Cushion, VS

0.78ct Yellow Color-Change Diaspore, Cushion, VS

6.3 x 4.7 mm

$ 41.18

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28.45ct Multicolor Jasper, Fancy, Opaque

28.45ct Multicolor Jasper, Fancy, Opaque

35.9 x 9.9 mm

$ 17.15

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4.71ct Yellow Citrine, Oval, VS

4.71ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 25.80

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1.61ct Green Tourmaline, Oval, VS

1.61ct Green Tourmaline, Oval, VS

7.1 x 6.4 mm

$ 187.08

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1.30ct Yellow Color-Change Diaspore, Cushion, VVS

1.30ct Yellow Color-Change Diaspore, Cushion, VVS

9.4 x 4.3 mm

$ 45.58

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4.71ct Yellow Citrine, Briolette, VVS-VS

4.71ct Yellow Citrine, Briolette, VVS-VS

13.7 x 7.9 mm

$ 21.98

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11.18ct Multicolor Labradorite, Pear Shape, Translucent

11.18ct Multicolor Labradorite, Pear Shape, Translucent

18 x 13 mm (calibrated)

$ 24.72

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3.08ct Pink Morganite, Pear Shape, Transparent

3.08ct Pink Morganite, Pear Shape, Transparent

12 x 8 mm (calibrated)

$ 33.75

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30.34ct Green Bloodstone, Oval, Opaque

30.34ct Green Bloodstone, Oval, Opaque

19.8 x 16.8 mm

$ 60.44

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1.76ct Pink Strawberry Quartz, Oval, Translucent

1.76ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 8.80

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5.40ct White Topaz, Oval, VS
Topaz Product Video (387138)

5.40ct White Topaz, Oval, VS

12 x 10 mm (calibrated)

$ 32.27

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15.74ct White Howlite, Pear Shape, Opaque

15.74ct White Howlite, Pear Shape, Opaque

22.2 x 17.3 mm

$ 7.53

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3.23ct Brown Cat'S Eye Apatite, Oval, Translucent

3.23ct Brown Cat'S Eye Apatite, Oval, Translucent

9 x 7 mm (calibrated)

$ 35.39

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1.87ct Blue Kyanite, Oval, SI

1.87ct Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 37.25

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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

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 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 could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

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

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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