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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 Price
Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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3.31ctw Green Peridot, Round, VVS-VS

3.31ctw Green Peridot, Round, VVS-VS

4.8 mm

$ 54.40

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11.80ct Yellow Citrine, Oval, VVS

11.80ct Yellow Citrine, Oval, VVS

18 x 13 mm (calibrated)

$ 64.64

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2.18ctw Yellow Sphene, Oval, Transparent

2.18ctw Yellow Sphene, Oval, Transparent

6.3 x 5.8 mm

$ 10.86

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6.61ct Violet Amethyst, Marquise, Transparent

6.61ct Violet Amethyst, Marquise, Transparent

16.2 x 9.8 mm

$ 32.92

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0.05ct Black Diamond, Round, Opaque

0.05ct Black Diamond, Round, Opaque

2.3 mm (calibrated)

$ 13.57

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0.74ct Orange Hessonite Garnet, Pear Shape, VS-SI

0.74ct Orange Hessonite Garnet, Pear Shape, VS-SI

6.8 x 4.7 mm

$ 16.22

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0.41ct Pink Tourmaline, Round, Transparent

0.41ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 16.33

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33.01ct Multicolor Jasper, Fancy, Opaque

33.01ct Multicolor Jasper, Fancy, Opaque

27.8 x 24.7 mm

$ 36.16

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4.11ct Yellow Citrine, Oval, VVS-VS

4.11ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 32.74

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2.03ct Red Almandine Garnet, Oval, VVS-VS

2.03ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 75.82

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3.63ct Green Tourmaline, Fancy, Translucent

3.63ct Green Tourmaline, Fancy, Translucent

12 x 10 mm (calibrated)

$ 39.77

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2.11ctw Orange Citrine, Heart, VVS

2.11ctw Orange Citrine, Heart, VVS

7 x 7 mm (calibrated)

$ 17.51

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19.82ct Multicolor Agate, Round, Opaque

19.82ct Multicolor Agate, Round, Opaque

17 mm (calibrated)

$ 15.79

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3.46ct Black Star Diopside, Round, Opaque

3.46ct Black Star Diopside, Round, Opaque

9 mm (calibrated)

$ 17.23

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0.52ct Yellow Sphalerite, Trillion, SI-I1

0.52ct Yellow Sphalerite, Trillion, SI-I1

5.2 x 5.1 mm

$ 25.90

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4.05ctw Violet Amethyst, Oval, VVS-VS

4.05ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 22.19

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1.60ct Pink Morganite, Pear Shape, VS

1.60ct Pink Morganite, Pear Shape, VS

10.8 x 6 mm

$ 122.71

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29.07ctw Multicolor Fossil Coral, Cushion, Opaque

29.07ctw Multicolor Fossil Coral, Cushion, Opaque

19.5 x 13.5 mm

$ 63.06

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18.69ct Violet Amethyst, Cushion, VVS

18.69ct Violet Amethyst, Cushion, VVS

20 x 15 mm (calibrated)

$ 130.31

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7.96ct Multicolor Agate, Oval, Translucent

7.96ct Multicolor Agate, Oval, Translucent

12.3 x 11.2 mm

$ 13.48

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2.58ctw Yellow Citrine, Emerald Cut, VVS

2.58ctw Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 20.56

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10.29ct Black Tourmaline, Emerald Cut, Opaque

10.29ct Black Tourmaline, Emerald Cut, Opaque

19.8 x 9.1 mm

$ 51.24

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9.66ct Multicolor Labradorite, Pear Shape, Translucent

9.66ct Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 21.36

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0.64ct Orange Citrine, Oval, VS

0.64ct Orange Citrine, Oval, VS

7 x 5 mm (calibrated)

$ 6.37

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

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
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

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate

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

Very pleasant

Posted By Varun in June, 2026
Source: Bizrate
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