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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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2.20ct Orange Hessonite Garnet, Oval, VS-SI

2.20ct Orange Hessonite Garnet, Oval, VS-SI

8.5 x 7.1 mm

$ 48.21

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5.03ct Violet Amethyst, Pear Shape, VVS

5.03ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 33.07

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1.65ct Pink Tourmaline, Emerald Cut, VVS-VS

1.65ct Pink Tourmaline, Emerald Cut, VVS-VS

10.3 x 4.6 mm

$ 124.74

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0.90ctw Red Pyrope Garnet, Square, VS

0.90ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 6.91

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6.41ct Yellow Rutile Quartz, Pear Shape, Transparent

6.41ct Yellow Rutile Quartz, Pear Shape, Transparent

14.2 x 10.8 mm

$ 24.58

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2.70ctw Violet Amethyst, Oval, VS

2.70ctw Violet Amethyst, Oval, VS

7 x 5 mm (calibrated)

$ 14.79

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1.96ct Red Almandine Garnet, Oval, VS

1.96ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 73.21

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13.47ct Green Druzy Variscite, Fancy, Opaque

13.47ct Green Druzy Variscite, Fancy, Opaque

23.7 x 14.2 mm

$ 18.78

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7.95ct Brown Tiger'S Eye, Baguette, Opaque

7.95ct Brown Tiger'S Eye, Baguette, Opaque

14.3 x 10.5 mm

$ 7.92

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7.15ct Multicolor Rainbow Pyrite, Fancy, Opaque

7.15ct Multicolor Rainbow Pyrite, Fancy, Opaque

19.3 x 9.8 mm

$ 21.36

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5.84ct Green Quartz Cat'S Eye, Oval, Opaque

5.84ct Green Quartz Cat'S Eye, Oval, Opaque

12 x 10 mm (calibrated)

$ 19.19

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2.78ct Violet Amethyst, Trillion, VVS

2.78ct Violet Amethyst, Trillion, VVS

10 x 10 mm (calibrated)

$ 19.38

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4.89ct Red Almandine Garnet, Pear Shape, VVS-VS

4.89ct Red Almandine Garnet, Pear Shape, VVS-VS

12.8 x 10.2 mm

$ 146.11

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23.75ct Multicolor Tiger'S Eye Matrix, Fancy, Opaque

23.75ct Multicolor Tiger'S Eye Matrix, Fancy, Opaque

33.7 x 11.6 mm

$ 23.66

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1.57ct Purple Rhodolite Garnet, Oval, VS

1.57ct Purple Rhodolite Garnet, Oval, VS

7.2 x 5.8 mm

$ 54.73

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1.66ct Green Tourmaline, Emerald Cut, SI

1.66ct Green Tourmaline, Emerald Cut, SI

18 x 3.3 mm

$ 40.01

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3.06ct Yellow Citrine, Square, VS

3.06ct Yellow Citrine, Square, VS

9 x 9 mm (calibrated)

$ 20.12

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0.12ct Black Diamond, Round, Opaque

0.12ct Black Diamond, Round, Opaque

3 mm (calibrated)

$ 41.08

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0.66ct Yellow Citrine, Pear Shape, VS

0.66ct Yellow Citrine, Pear Shape, VS

7 x 5 mm (calibrated)

$ 3.29

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2.59ct Pink Strawberry Quartz, Round, Transparent

2.59ct Pink Strawberry Quartz, Round, Transparent

8 mm (calibrated)

$ 15.84

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2.92ct Yellow Citrine, Oval, VVS-VS

2.92ct Yellow Citrine, Oval, VVS-VS

11.4 x 8.6 mm

$ 22.39

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1.53ct Orange Hessonite Garnet, Oval, VS-SI

1.53ct Orange Hessonite Garnet, Oval, VS-SI

7.7 x 6.3 mm

$ 30.48

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2.66ctw Green Peridot, Round, VVS-VS

2.66ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 43.72

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7.40ctw White Topaz, Square, VS

7.40ctw White Topaz, Square, VS

5 x 5 mm (calibrated)

$ 61.59

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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

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 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

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate
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