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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
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1.39ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 9.69

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1.35ct Green Tourmaline, Emerald Cut, VS

18 x 3.5 mm

$ 35.50

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0.65ct Yellow Beryl, Trillion, VVS

7 x 7 mm (calibrated)

$ 12.95

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3.47ct Yellow Citrine, Emerald Cut, Transparent

12 x 10 mm (calibrated)

$ 26.61

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20.61ct Brown Moonstone, Oval, Opaque

21.4 x 16.1 mm

$ 45.16

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3.18ct Yellow Sphene, Oval, Translucent

8.4 x 7.5 mm

$ 17.42

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9.32ct Multicolor Rainbow Pyrite, Square, Opaque

14 x 14 mm (calibrated)

$ 24.05

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2.13ct Yellow Citrine, Oval, VVS-VS

10.7 x 6.5 mm

$ 16.33

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1.79ct Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 8.18

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7.09ct Bi-Color Ametrine, Emerald Cut, VVS-VS

14 x 10 mm (calibrated)

$ 101.63

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1.10ctw Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 9.86

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3.36ct Multicolor Pietersite, Marquise, Opaque

19.5 x 7.4 mm

$ 8.13

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0.34ct Green Sphene, Cushion, VS

3.9 x 3.8 mm

$ 14.90

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3.61ctw White Rainbow Moonstone, Square, Transparent

3.2 x 3.1 mm

$ 67.24

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4.38ct Multicolor Pietersite, Oval, Opaque

18.4 x 8.6 mm

$ 13.09

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0.66ct Orange Sphalerite, Round, SI

5 mm (calibrated)

$ 32.87

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0.88ct Green Tourmaline, Baguette, VS

5.5 x 4.4 mm

$ 30.68

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2.89ct Orange Hessonite Garnet, Oval, VS-SI

9.5 x 7.6 mm

$ 46.51

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28.06ct Multicolor Jasper, Baguette, Opaque

22.9 x 16.3 mm

$ 15.93

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1.53ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.74

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1.47ct Multicolor Opal, Pear Shape, Transparent

12 x 8 mm (calibrated)

$ 51.78

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2.89ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 15.84

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3.09ctw Yellow Golden Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 67.71

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33.08ct Green Maw-Sit-Sit, Baguette, Opaque

18.3 x 15.9 mm

$ 108.72

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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

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

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 -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate
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