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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
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Untreated Gemstones Treatment

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1.53ct Orange Hessonite Garnet, Square, VS

1.53ct Orange Hessonite Garnet, Square, VS

6 x 6 mm (calibrated)

$ 25.74

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8.81ctw Green Amazonite, Cushion, Opaque

8.81ctw Green Amazonite, Cushion, Opaque

7.3 x 7.2 mm

$ 21.43

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0.42ct Blue Kyanite, Round, SI

0.42ct Blue Kyanite, Round, SI

4.5 mm (calibrated)

$ 10.46

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0.36ct Yellow Citrine, Trillion, VS

0.36ct Yellow Citrine, Trillion, VS

5 x 5 mm (calibrated)

$ 2.99

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11.82ct Blue Color-Change Fluorite, Round, VS

11.82ct Blue Color-Change Fluorite, Round, VS

14 mm (calibrated)

$ 323.75

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21.20ct Multicolor Boulder Opal, Pear Shape, Opaque
Boulder Opal Product Video (449597)

21.20ct Multicolor Boulder Opal, Pear Shape, Opaque

25 x 18 mm (calibrated)

$ 162.59

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0.98ct Orange Hessonite Garnet, Oval, VVS-VS

0.98ct Orange Hessonite Garnet, Oval, VVS-VS

6.6 x 5.4 mm

$ 14.97

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0.63ct Green Tourmaline, Emerald Cut, VVS-VS

0.63ct Green Tourmaline, Emerald Cut, VVS-VS

7.5 x 3.2 mm

$ 31.37

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0.93ct Orange Sunstone, Oval, Translucent

0.93ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.48

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2.80ct Pink Kunzite, Oval, VS
Kunzite Product Video (678366)

2.80ct Pink Kunzite, Oval, VS

8.6 x 7.2 mm

$ 83.66

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1.41ct Pink Tourmaline, Oval, VS

1.41ct Pink Tourmaline, Oval, VS

7.6 x 5.7 mm

$ 216.27

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0.55ct Green Peridot, Marquise, VS

0.55ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.22

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0.58ct Yellow Color-Change Diaspore, Oval, VS

0.58ct Yellow Color-Change Diaspore, Oval, VS

6.3 x 4.9 mm

$ 21.47

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7.83ctw Multicolor Labradorite, Marquise, Translucent

7.83ctw Multicolor Labradorite, Marquise, Translucent

14 x 7 mm (calibrated)

$ 17.31

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0.43ct White Rainbow Moonstone, Baguette, Transparent

0.43ct White Rainbow Moonstone, Baguette, Transparent

6 x 4 mm (calibrated)

$ 14.99

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1.76ct Multicolor Labradorite, Round, Translucent

1.76ct Multicolor Labradorite, Round, Translucent

7 mm (calibrated)

$ 2.10

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3.66ct Pink Strawberry Quartz, Oval, Translucent

3.66ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 28.07

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0.86ct Purple Spinel, Cushion, VS

0.86ct Purple Spinel, Cushion, VS

5.9 x 5.1 mm

$ 102.79

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8.85ct Brown Smoky Quartz, Emerald Cut, VVS

8.85ct Brown Smoky Quartz, Emerald Cut, VVS

11.8 x 11.4 mm

$ 24.24

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7.70ctw White Topaz, Square, VVS-VS

7.70ctw White Topaz, Square, VVS-VS

5 x 5 mm (calibrated)

$ 61.27

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1.93ct Yellow Beryl, Round, VS

1.93ct Yellow Beryl, Round, VS

8.5 mm (calibrated)

$ 46.13

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24.81ctw Multicolor Jasper, Sphere / Ball, Opaque

24.81ctw Multicolor Jasper, Sphere / Ball, Opaque

12 mm (calibrated)

$ 27.18

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29.81ct White Rainbow Moonstone, Oval, Translucent

29.81ct White Rainbow Moonstone, Oval, Translucent

25 x 18 mm (calibrated)

$ 29.69

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1.13ct Green Tourmaline, Round, Transparent

1.13ct Green Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 20.63

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

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
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

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

love the site, the experience and the products.

Posted By Ckingpots 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 -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate
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