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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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1.32ct Yellow Beryl, Cushion, VVS

1.32ct Yellow Beryl, Cushion, VVS

8 x 6 mm (calibrated)

$ 31.56

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51.90ct Pink Rose Quartz, Oval, Transparent

51.90ct Pink Rose Quartz, Oval, Transparent

27 x 20 mm (calibrated)

$ 93.26

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4.03ctw Red Pyrope Garnet, Square, VS

4.03ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 30.91

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1.36ct Orange Hessonite Garnet, Oval, VS

1.36ct Orange Hessonite Garnet, Oval, VS

7.7 x 6.3 mm

$ 27.09

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0.14ct White Diamond, Round, VS

0.14ct White Diamond, Round, VS

3.4 mm

$ 235.06

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2.13ct Red Tourmaline, Cushion, Transparent

2.13ct Red Tourmaline, Cushion, Transparent

6 x 6 mm (calibrated)

$ 24.93

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1.22ct Red Malaya Garnet, Marquise, VVS-VS

1.22ct Red Malaya Garnet, Marquise, VVS-VS

10 x 5.2 mm

$ 46.78

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1.37ctw Red Pyrope Garnet, Square, VS-SI

1.37ctw Red Pyrope Garnet, Square, VS-SI

5 x 5 mm (calibrated)

$ 10.51

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4.59ct Pink Strawberry Quartz, Oval, Translucent

4.59ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 54.86

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10.67ct Multicolor Labradorite, Marquise, Translucent

10.67ct Multicolor Labradorite, Marquise, Translucent

22.1 x 10.8 mm

$ 12.96

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2.70ct Yellow Citrine, Oval, VS

2.70ct Yellow Citrine, Oval, VS

12 x 8 mm (calibrated)

$ 20.71

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0.91ct Orange Sphalerite, Round, SI

0.91ct Orange Sphalerite, Round, SI

5.5 mm (calibrated)

$ 45.32

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0.27ct Violet Iolite, Emerald Cut, SI

0.27ct Violet Iolite, Emerald Cut, SI

5 x 3 mm (calibrated)

$ 10.76

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5.80ctw Brown Tiger'S Eye, Oval, Opaque

5.80ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 5.78

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3.94ct Violet Amethyst, Marquise, VS

3.94ct Violet Amethyst, Marquise, VS

16.5 x 7.9 mm

$ 27.47

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0.42ct Yellow Citrine, Oval, VVS-VS

0.42ct Yellow Citrine, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 2.93

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3.43ct Multicolor Labradorite, Pear Shape, Translucent

3.43ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 7.58

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3.72ct Pink Morganite, Pear Shape, Transparent

3.72ct Pink Morganite, Pear Shape, Transparent

13 x 9 mm (calibrated)

$ 37.05

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1.61ct Green Tourmaline, Baguette, VS

1.61ct Green Tourmaline, Baguette, VS

13.8 x 3.5 mm

$ 56.12

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1.00ct Gray Cat'S Eye Alexandrite, Oval, Opaque

1.00ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.6 x 4.4 mm

$ 207.50

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3.63ct Green Tourmaline, Fancy, Translucent

3.63ct Green Tourmaline, Fancy, Translucent

12 x 10 mm (calibrated)

$ 39.77

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3.76ct Green Apatite, Emerald Cut, VS

3.76ct Green Apatite, Emerald Cut, VS

8.5 x 8.3 mm

$ 153.04

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0.88ct Black Diamond, Round, Opaque
Diamond Product Video (669016)

0.88ct Black Diamond, Round, Opaque

5.5 mm (calibrated)

$ 701.18

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1.60ct Multicolor Opal, Pear Shape, Transparent

1.60ct Multicolor Opal, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 33.47

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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

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

Posted By CLTCJH in February, 2026
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

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate
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