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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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5.19ct Green Prehnite, Fancy, Translucent

5.19ct Green Prehnite, Fancy, Translucent

12.9 x 9.7 mm

$ 8.52

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0.94ctw Orange Spessartite Garnet, Oval, VS

0.94ctw Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 32.77

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1.02ctw Green Peridot, Oval, Transparent

1.02ctw Green Peridot, Oval, Transparent

6 x 4 mm (calibrated)

$ 18.28

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0.54ct Red Pyrope Garnet, Heart, VS

0.54ct Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 13.45

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38.65ct Gray Hematite, Round, Opaque

38.65ct Gray Hematite, Round, Opaque

21.7 mm

$ 37.69

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2.43ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (439262)

2.43ct Yellow Apatite, Emerald Cut, VS

8 x 8 mm (calibrated)

$ 125.13

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2.42ct Turquoise Fluorite, Pear Shape, Transparent

2.42ct Turquoise Fluorite, Pear Shape, Transparent

9.2 x 7.6 mm

$ 10.32

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0.29ct Green Kornerupine, Baguette, VS

0.29ct Green Kornerupine, Baguette, VS

5 x 3 mm (calibrated)

$ 24.84

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12.25ct Turquoise Grandidierite, Pear Shape, Translucent
Grandidierite Product Video (471781)

12.25ct Turquoise Grandidierite, Pear Shape, Translucent

17.7 x 13.6 mm

$ 939.48

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19.26ct Brown Tiger'S Eye, Fancy, Opaque

19.26ct Brown Tiger'S Eye, Fancy, Opaque

33.5 x 9.1 mm

$ 1.93

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0.71ct Yellow Tourmaline, Round, Transparent

0.71ct Yellow Tourmaline, Round, Transparent

5.2 mm

$ 14.14

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12.43ct Green Prehnite, Fancy, Translucent

12.43ct Green Prehnite, Fancy, Translucent

18.5 x 12.1 mm

$ 20.42

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2.79ct Yellow Sphene, Oval, Transparent

2.79ct Yellow Sphene, Oval, Transparent

8.8 x 7.3 mm

$ 13.89

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1.91ct Yellow Apatite, Oval, VS-SI

1.91ct Yellow Apatite, Oval, VS-SI

9 x 7 mm (calibrated)

$ 52.32

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7.00ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (467815)

7.00ct Blue Aquamarine, Emerald Cut, VVS

15.4 x 7.5 mm

$ 1,380.46

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0.77ct Orange Zircon, Oval, VVS

0.77ct Orange Zircon, Oval, VVS

6 x 6 mm (calibrated)

$ 19.17

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2.70ctw Red Pyrope Garnet, Marquise, VVS-VS

2.70ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 23.66

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0.89ct Green Sphene, Oval, Transparent

0.89ct Green Sphene, Oval, Transparent

5.6 x 5.3 mm

$ 4.88

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1.76ct Orange Hessonite Garnet, Oval, VS-SI

1.76ct Orange Hessonite Garnet, Oval, VS-SI

8.4 x 6.8 mm

$ 26.24

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10.32ct Multicolor Agate, Oval, Opaque

10.32ct Multicolor Agate, Oval, Opaque

13.4 x 11.5 mm

$ 9.76

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5.47ctw Red Pyrope Garnet, Pear Shape, VVS-VS

5.47ctw Red Pyrope Garnet, Pear Shape, VVS-VS

7.2 x 5.2 mm

$ 41.95

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4.18ct Red Almandine Garnet, Oval, VVS

4.18ct Red Almandine Garnet, Oval, VVS

11 x 9 mm (calibrated)

$ 156.12

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38.32ct Multicolor Jasper, Oval, Opaque

38.32ct Multicolor Jasper, Oval, Opaque

35.4 x 24.3 mm

$ 18.54

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1.80ct Pink Strawberry Quartz, Round, Translucent

1.80ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 13.80

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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

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

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

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

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

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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