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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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3.89ct Yellow Citrine, Oval, VVS-VS

3.89ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 30.99

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1.49ct Orange Zircon, Oval, VS

1.49ct Orange Zircon, Oval, VS

6.9 x 6 mm

$ 40.82

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1.11ct Yellow Beryl, Oval, VS

1.11ct Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 22.11

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8.79ct Violet Amethyst, Oval, Transparent

8.79ct Violet Amethyst, Oval, Transparent

14.9 x 12.6 mm

$ 52.53

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5.73ctw Orange Sunstone, Oval, Translucent

5.73ctw Orange Sunstone, Oval, Translucent

10 x 8 mm (calibrated)

$ 43.94

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1.20ct Purple Spinel, Oval, VVS-VS
Spinel Product Video (349497)

1.20ct Purple Spinel, Oval, VVS-VS

8 x 5 mm (calibrated)

$ 82.17

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18.57ct Blue Chalcedony, Cushion, Opaque

18.57ct Blue Chalcedony, Cushion, Opaque

26.4 x 14.7 mm

$ 46.25

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11.20ct Multicolor Labradorite, Pear Shape, Translucent

11.20ct Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 24.76

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17.09ct Green Serpentine, Oval, Translucent

17.09ct Green Serpentine, Oval, Translucent

27.6 x 17 mm

$ 36.59

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1.29ct Blue Kyanite, Oval, SI

1.29ct Blue Kyanite, Oval, SI

7.1 x 5.2 mm

$ 28.27

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67.02ct Multicolor Chrysocolla, Pear Shape, Opaque
Chrysocolla Product Video (658622)

67.02ct Multicolor Chrysocolla, Pear Shape, Opaque

34.3 x 32.1 mm

$ 114.14

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2.51ct Green Tourmaline, Emerald Cut, VVS

2.51ct Green Tourmaline, Emerald Cut, VVS

22.2 x 3.6 mm

$ 87.50

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1.59ctw Blue Kyanite, Round, VS-SI

1.59ctw Blue Kyanite, Round, VS-SI

5.2 mm

$ 31.67

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0.67ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.67ct Yellow Color-Change Diaspore, Emerald Cut, VS

6.6 x 4.3 mm

$ 22.02

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18.10ct Brown Star Sunstone, Oval, Opaque

18.10ct Brown Star Sunstone, Oval, Opaque

16.1 x 13.4 mm

$ 150.23

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0.98ct Blue Kyanite, Oval, VS

0.98ct Blue Kyanite, Oval, VS

7 x 5 mm (calibrated)

$ 24.40

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3.39ctw Multicolor Labradorite, Round, Translucent

3.39ctw Multicolor Labradorite, Round, Translucent

7 mm (calibrated)

$ 4.05

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1.48ct Orange Hessonite Garnet, Cushion, VVS-VS

1.48ct Orange Hessonite Garnet, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 26.54

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5.65ct Green Jadeite, Oval, Translucent

5.65ct Green Jadeite, Oval, Translucent

12.2 x 11.3 mm

$ 15.48

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1.05ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.05ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.8 x 5.2 mm

$ 3.28

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2.45ct Yellow Citrine, Oval, VS

2.45ct Yellow Citrine, Oval, VS

10 x 8 mm (calibrated)

$ 13.43

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1.52ct Multicolor Spectrolite, Round, Opaque

1.52ct Multicolor Spectrolite, Round, Opaque

8 mm (calibrated)

$ 6.96

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75.13ct Multicolor Jasper, Oval, Opaque

75.13ct Multicolor Jasper, Oval, Opaque

31.9 x 24.9 mm

$ 38.69

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10.37ctw Multicolor Labradorite, Marquise, Translucent

10.37ctw Multicolor Labradorite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 22.92

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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

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 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 -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 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

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate
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