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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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7.42ctw Black Spinel, Round, Opaque

7.42ctw Black Spinel, Round, Opaque

9.5 mm (calibrated)

$ 32.52

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6.08ct Violet Amethyst, Pear Shape, Transparent

6.08ct Violet Amethyst, Pear Shape, Transparent

16.4 x 9.8 mm

$ 36.34

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72.36ct Multicolor Tiger'S Eye Matrix, Fancy, Opaque

72.36ct Multicolor Tiger'S Eye Matrix, Fancy, Opaque

41.1 x 23.6 mm

$ 41.09

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2.71ct Black Cat'S Eye Scapolite, Round, Translucent

2.71ct Black Cat'S Eye Scapolite, Round, Translucent

9.5 mm (calibrated)

$ 14.85

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2.93ct Red Almandine Garnet, Pear Shape, VVS-VS

2.93ct Red Almandine Garnet, Pear Shape, VVS-VS

12 x 8 mm (calibrated)

$ 109.44

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3.81ct Yellow Citrine, Emerald Cut, VVS

3.81ct Yellow Citrine, Emerald Cut, VVS

11 x 9 mm (calibrated)

$ 29.22

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2.27ct Yellow Citrine, Cushion, VVS-VS

2.27ct Yellow Citrine, Cushion, VVS-VS

9.9 x 7.6 mm

$ 17.41

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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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7.11ct Yellow Apatite, Pear Shape, VS
Apatite Product Video (382121)

7.11ct Yellow Apatite, Pear Shape, VS

15.4 x 11.1 mm

$ 233.69

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2.53ct Yellow Citrine, Cushion, VVS-VS

2.53ct Yellow Citrine, Cushion, VVS-VS

9.6 x 6.9 mm

$ 19.41

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1.50ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.50ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7.7 x 5.7 mm

$ 25.23

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23.88ct Multicolor Jasper, Oval, Opaque

23.88ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 26.16

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3.02ctw Yellow Citrine, Oval, VS

3.02ctw Yellow Citrine, Oval, VS

9 x 7 mm (calibrated)

$ 16.54

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0.48ct Yellow Citrine, Heart, VVS-VS

0.48ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 3.83

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9.33ct Multicolor Quartz With Marcasite, Oval, Transparent
Quartz With Marcasite Product Video (521350)

9.33ct Multicolor Quartz With Marcasite, Oval, Transparent

15.5 x 13.5 mm

$ 61.34

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26.55ct Multicolor Jasper, Pear Shape, Opaque

26.55ct Multicolor Jasper, Pear Shape, Opaque

29.2 x 21.1 mm

$ 19.49

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12.25ct Multicolor Agate, Oval, Opaque

12.25ct Multicolor Agate, Oval, Opaque

16.9 x 14.5 mm

$ 20.75

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6.56ct Brown Smoky Quartz, Emerald Cut, VS

6.56ct Brown Smoky Quartz, Emerald Cut, VS

12 x 12 mm (calibrated)

$ 35.94

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37.17ct Green Malachite, Fancy, Opaque

37.17ct Green Malachite, Fancy, Opaque

21.3 x 15.5 mm

$ 37.02

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1.02ct Green Peridot, Oval, VS

1.02ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 9.15

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8.64ctw Black Spinel, Round, Opaque

8.64ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 33.13

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14.92ct Violet Amethyst, Emerald Cut, VS

14.92ct Violet Amethyst, Emerald Cut, VS

18 x 13 mm (calibrated)

$ 104.02

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0.87ctw Green Peridot, Pear Shape, VVS-VS

0.87ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 7.63

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18.80ct Brown Moonstone, Oval, Translucent

18.80ct Brown Moonstone, Oval, Translucent

21.6 x 16 mm

$ 41.19

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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 needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 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

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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