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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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Yellow Untreated Gemstones
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50.15ct Yellow Calcite, Oval, Translucent

50.15ct Yellow Calcite, Oval, Translucent

39.5 x 20.3 mm

$ 34.46

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4.69ct Violet Amethyst, Oval, VVS

4.69ct Violet Amethyst, Oval, VVS

13.3 x 10.3 mm

$ 32.70

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2.22ct Yellow Citrine, Square, VVS

2.22ct Yellow Citrine, Square, VVS

8 x 8 mm (calibrated)

$ 12.99

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18.00ct Multicolor Ruby-Zoisite, Baguette, Opaque

18.00ct Multicolor Ruby-Zoisite, Baguette, Opaque

22.1 x 12.3 mm

$ 32.14

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1.17ct Multicolor Pietersite, Pear Shape, Opaque

1.17ct Multicolor Pietersite, Pear Shape, Opaque

11.1 x 5.9 mm

$ 2.83

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1.64ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.64ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.7 x 5.4 mm

$ 5.39

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7.49ct Multicolor Rainbow Pyrite, Fancy, Opaque

7.49ct Multicolor Rainbow Pyrite, Fancy, Opaque

21.8 x 10.8 mm

$ 22.38

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0.44ct Green Peridot, Pear Shape, VVS-VS

0.44ct Green Peridot, Pear Shape, VVS-VS

6.5 x 4.4 mm

$ 7.23

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7.62ct Black Tourmaline, Oval, Opaque

7.62ct Black Tourmaline, Oval, Opaque

13 x 11 mm (calibrated)

$ 37.95

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1.83ctw Orange Sunstone, Oval, Translucent

1.83ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 12.76

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0.82ct Orange Zircon, Oval, VVS

0.82ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 20.42

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0.66ct Pink Spinel, Oval, VVS

0.66ct Pink Spinel, Oval, VVS

5.7 x 4.3 mm

$ 54.78

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0.73ct Yellow Color-Change Diaspore, Cushion, VS

0.73ct Yellow Color-Change Diaspore, Cushion, VS

5.6 x 4.4 mm

$ 38.54

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2.01ctw Green Peridot, Oval, VS

2.01ctw Green Peridot, Oval, VS

7.1 x 5.2 mm

$ 14.01

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0.87ct Green Peridot, Oval, VVS-VS

0.87ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 6.07

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16.89ctw Multicolor Labradorite, Round, Translucent

16.89ctw Multicolor Labradorite, Round, Translucent

13 mm (calibrated)

$ 41.04

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36.82ct Red Star Garnet, Oval, Opaque

36.82ct Red Star Garnet, Oval, Opaque

21.3 x 17.4 mm

$ 36.30

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10.95ct Red Star Garnet, Oval, Opaque

10.95ct Red Star Garnet, Oval, Opaque

13.8 x 11.4 mm

$ 11.35

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41.06ct Multicolor Jasper, Oval, Opaque

41.06ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 24.29

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2.08ct Pink Tourmaline, Oval, VS

2.08ct Pink Tourmaline, Oval, VS

8.6 x 7.8 mm

$ 241.70

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0.74ct Green Peridot, Oval, VVS-VS

0.74ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 10.32

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2.20ct Orange Hessonite Garnet, Cushion, VVS-VS

2.20ct Orange Hessonite Garnet, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 43.82

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1.09ctw Yellow Zircon, Oval, VVS-VS

1.09ctw Yellow Zircon, Oval, VVS-VS

5 x 4 mm (calibrated)

$ 27.14

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24.92ct Green Tourmaline, Flower Cut, Transparent
Tourmaline Product Video (690557)

24.92ct Green Tourmaline, Flower Cut, Transparent

22.4 x 18.4 mm

$ 485.73

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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 have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
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Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate
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