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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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5.49ct Black Star Diopside, Oval, Opaque

5.49ct Black Star Diopside, Oval, Opaque

12 x 10 mm (calibrated)

$ 27.34

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0.15ctw White Diamond, Round, VVS-VS
Diamond Product Video (565088)

0.15ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 272.54

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23.81ct Multicolor Jasper, Oval, Opaque

23.81ct Multicolor Jasper, Oval, Opaque

25 x 18 mm (calibrated)

$ 13.51

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7.55ct Multicolor Labradorite, Round, Translucent

7.55ct Multicolor Labradorite, Round, Translucent

12 mm (calibrated)

$ 9.02

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30.74ctw Multicolor Moss Agate, Oval, Translucent

30.74ctw Multicolor Moss Agate, Oval, Translucent

29.2 x 14.4 mm

$ 30.62

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7.77ctw Black Spinel, Round, Opaque

7.77ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 25.54

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1.43ct Multicolor Spectrolite, Round, Opaque

1.43ct Multicolor Spectrolite, Round, Opaque

7 mm (calibrated)

$ 6.57

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2.94ct Turquoise Fluorite, Pear Shape, Transparent

2.94ct Turquoise Fluorite, Pear Shape, Transparent

9.4 x 7.4 mm

$ 11.71

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5.12ct Yellow Citrine, Cushion, VS

5.12ct Yellow Citrine, Cushion, VS

12 x 10 mm (calibrated)

$ 39.26

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1.07ct Green Sphene, Oval, Transparent

1.07ct Green Sphene, Oval, Transparent

6.3 x 5.5 mm

$ 5.33

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1.13ct Violet Amethyst, Marquise, VS

1.13ct Violet Amethyst, Marquise, VS

10 x 5 mm (calibrated)

$ 7.50

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1.55ctw Red Rhodolite Garnet, Square, VS

1.55ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.56

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0.69ct Pink Spinel, Cushion, VS

0.69ct Pink Spinel, Cushion, VS

5.3 x 4.8 mm

$ 51.54

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1.05ct Orange Sunstone, Oval, Translucent

1.05ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 7.32

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3.67ctw Violet Amethyst, Oval, VVS-VS

3.67ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 20.11

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2.18ct Red Almandine Garnet, Oval, VVS

2.18ct Red Almandine Garnet, Oval, VVS

9 x 7 mm (calibrated)

$ 81.42

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2.25ct Violet Amethyst, Trillion, VVS-VS

2.25ct Violet Amethyst, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 12.33

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11.22ct Yellow Citrine, Oval, VVS
Citrine Product Video (504842)

11.22ct Yellow Citrine, Oval, VVS

18 x 13 mm (calibrated)

$ 86.05

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1.70ct Yellow Beryl, Oval, VVS

1.70ct Yellow Beryl, Oval, VVS

9 x 7 mm (calibrated)

$ 33.86

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1.02ct Yellow Citrine, Emerald Cut, VVS-VS

1.02ct Yellow Citrine, Emerald Cut, VVS-VS

12.2 x 4 mm

$ 8.13

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4.05ct Orange Sunstone, Round, Transparent

4.05ct Orange Sunstone, Round, Transparent

11 mm (calibrated)

$ 24.72

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8.55ct Green Prehnite, Fancy, Translucent

8.55ct Green Prehnite, Fancy, Translucent

16.7 x 10.4 mm

$ 14.04

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30.44ctw Multicolor Fossil Coral, Fancy, Opaque

30.44ctw Multicolor Fossil Coral, Fancy, Opaque

22.8 x 12.4 mm

$ 27.79

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0.92ct Green Tourmaline, Baguette, VS

0.92ct Green Tourmaline, Baguette, VS

11.6 x 3.3 mm

$ 32.07

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 site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 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

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate
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