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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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0.93ct Purple Spinel, Cushion, VS

0.93ct Purple Spinel, Cushion, VS

5.4 x 5.2 mm

$ 46.31

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38.52ct Yellow Calcite, Pear Shape, Translucent

38.52ct Yellow Calcite, Pear Shape, Translucent

32.1 x 21.8 mm

$ 26.48

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1.07ct Orange Hessonite Garnet, Baguette, VS-SI

1.07ct Orange Hessonite Garnet, Baguette, VS-SI

6.1 x 4.5 mm

$ 20.22

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1.34ct Yellow Beryl, Oval, VVS-VS

1.34ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 25.58

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0.71ct Orange Citrine, Oval, VVS-VS

0.71ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 7.07

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1.18ctw Blue Kyanite, Round, VS-SI

1.18ctw Blue Kyanite, Round, VS-SI

4.3 mm

$ 29.38

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4.40ct Yellow Citrine, Oval, VS

4.40ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 24.10

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1.08ctw Red Pyrope Garnet, Heart, VS
Pyrope Garnet Product Video (572109)

1.08ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 25.81

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2.06ct Purple Rhodolite Garnet, Oval, VS

2.06ct Purple Rhodolite Garnet, Oval, VS

7.7 x 6.7 mm

$ 62.68

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2.16ct Green Prehnite, Oval, Transparent

2.16ct Green Prehnite, Oval, Transparent

8 x 6.4 mm

$ 13.94

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5.00ctw Yellow Citrine, Oval, VVS-VS

5.00ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 32.87

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0.51ct Yellow Color-Change Diaspore, Baguette, VS

0.51ct Yellow Color-Change Diaspore, Baguette, VS

5.2 x 4.1 mm

$ 17.89

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1.26ct Green Sphene, Oval, Transparent

1.26ct Green Sphene, Oval, Transparent

6.9 x 6.4 mm

$ 6.27

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0.53ct Red Spinel, Oval, VS

0.53ct Red Spinel, Oval, VS

5.4 x 4.4 mm

$ 43.99

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16.02ct White Rainbow Moonstone, Pear Shape, Transparent

16.02ct White Rainbow Moonstone, Pear Shape, Transparent

19.4 x 16.2 mm

$ 239.34

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1.20ctw Green Peridot, Oval, Transparent

1.20ctw Green Peridot, Oval, Transparent

6 x 4 mm (calibrated)

$ 21.51

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1.18ct Yellow Citrine, Round, VVS-VS

1.18ct Yellow Citrine, Round, VVS-VS

7 mm (calibrated)

$ 7.84

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1.03ctw Violet Amethyst, Emerald Cut, VS

1.03ctw Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 5.98

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1.52ct Green Tourmaline, Emerald Cut, VVS-VS

1.52ct Green Tourmaline, Emerald Cut, VVS-VS

21.5 x 3 mm

$ 28.92

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1.53ct Yellow Citrine, Oval, Transparent

1.53ct Yellow Citrine, Oval, Transparent

10 x 8 mm (calibrated)

$ 11.74

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0.93ctw Green Peridot, Pear Shape, VVS-VS

0.93ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 8.15

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8.10ct Multicolor Pietersite, Pear Shape, Opaque

8.10ct Multicolor Pietersite, Pear Shape, Opaque

22.5 x 13.7 mm

$ 20.17

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50.90ct Black Nuummite, Round, Opaque

50.90ct Black Nuummite, Round, Opaque

33 mm

$ 183.47

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1.43ctw Yellow Citrine, Heart, VVS

1.43ctw Yellow Citrine, Heart, VVS

6 x 6 mm (calibrated)

$ 9.97

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

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate

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

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

love the site, the experience and the products.

Posted By Ckingpots in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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