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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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1.01ct Pink Morganite, Pear Shape, VS

1.01ct Pink Morganite, Pear Shape, VS

8.7 x 5.5 mm

$ 110.66

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1.32ct White Sillimanite Cat'S Eye, Round, Transparent

1.32ct White Sillimanite Cat'S Eye, Round, Transparent

6 mm (calibrated)

$ 4.13

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0.84ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.84ct Yellow Color-Change Diaspore, Emerald Cut, VS

7.2 x 4.5 mm

$ 43.96

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3.74ct Pink Tourmaline, Emerald Cut, VS
Tourmaline Product Video (742819)

3.74ct Pink Tourmaline, Emerald Cut, VS

12.8 x 6.4 mm

$ 465.63

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10.99ct Multicolor Agate, Oval, Opaque

10.99ct Multicolor Agate, Oval, Opaque

14 x 14 mm (calibrated)

$ 18.61

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3.93ctw Green Peridot, Round, VS

3.93ctw Green Peridot, Round, VS

5.7 mm

$ 38.41

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2.30ctw Red Pyrope Garnet, Marquise, VVS-VS

2.30ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 20.16

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0.57ctw Blue Kyanite, Round, VS-SI

0.57ctw Blue Kyanite, Round, VS-SI

3.5 mm (calibrated)

$ 10.22

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5.90ct Yellow Cat'S Eye Opal, Oval, Translucent

5.90ct Yellow Cat'S Eye Opal, Oval, Translucent

14 x 9 mm (calibrated)

$ 23.51

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2.22ct Red Almandine Garnet, Oval, VS

2.22ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 82.92

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79.32ctw Gray Hematite, Round, Opaque

79.32ctw Gray Hematite, Round, Opaque

21.7 mm

$ 77.34

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37.54ct Brown Tiger'S Eye Matrix, Fancy, Opaque

37.54ct Brown Tiger'S Eye Matrix, Fancy, Opaque

36.3 x 17.6 mm

$ 21.31

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25.22ct Gray Hematite, Square, Opaque

25.22ct Gray Hematite, Square, Opaque

16 x 16 mm (calibrated)

$ 25.41

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5.94ct White Topaz, Oval, VS

5.94ct White Topaz, Oval, VS

12 x 10 mm (calibrated)

$ 39.44

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24.86ct Violet Amethyst, Round, VVS

24.86ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 173.32

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36.13ct Multicolor Jasper, Fancy, Opaque

36.13ct Multicolor Jasper, Fancy, Opaque

36.6 x 20.9 mm

$ 17.42

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1.93ct Pink Morganite, Trillion, Transparent

1.93ct Pink Morganite, Trillion, Transparent

8.4 x 8 mm

$ 21.15

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0.53ct Yellow Color-Change Diaspore, Baguette, VS

0.53ct Yellow Color-Change Diaspore, Baguette, VS

6.4 x 3.5 mm

$ 27.98

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12.05ctw Multicolor Pietersite, Pear Shape, Opaque

12.05ctw Multicolor Pietersite, Pear Shape, Opaque

18.9 x 10.8 mm

$ 28.28

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11.60ct Red Strawberry Quartz, Oval, Translucent

11.60ct Red Strawberry Quartz, Oval, Translucent

15.7 x 13 mm

$ 88.96

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1.57ct Green Tourmaline, Round, Transparent

1.57ct Green Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 26.35

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28.12ct Green Jadeite, Fancy, Translucent

28.12ct Green Jadeite, Fancy, Translucent

40.5 x 14.7 mm

$ 19.26

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2.08ct Yellow Citrine, Trillion, VS

2.08ct Yellow Citrine, Trillion, VS

9 x 9 mm (calibrated)

$ 15.95

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3.28ct Pink Rose Quartz, Emerald Cut, Transparent

3.28ct Pink Rose Quartz, Emerald Cut, Transparent

9 x 9 mm (calibrated)

$ 17.97

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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 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

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

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 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
→ View All GemSelect Reviews on Bizrate
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