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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
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8.10ctw Multicolor Labradorite, Pear Shape, Translucent

8.10ctw Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 17.91

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4.90ct Green Prehnite, Fancy, Translucent

4.90ct Green Prehnite, Fancy, Translucent

14.3 x 10.1 mm

$ 8.06

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13.27ct Multicolor Rainbow Pyrite, Trillion, Opaque

13.27ct Multicolor Rainbow Pyrite, Trillion, Opaque

22.6 x 18.7 mm

$ 34.36

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1.08ct Blue Kyanite, Oval, SI

1.08ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 26.89

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1.07ct Blue Kyanite, Oval, SI

1.07ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 26.64

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12.54ct Brown Tiger'S Eye, Baguette, Opaque

12.54ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 16.23

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1.43ctw Red Pyrope Garnet, Square, VVS

1.43ctw Red Pyrope Garnet, Square, VVS

5 x 5 mm (calibrated)

$ 10.96

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0.92ct Orange Fire Opal, Oval, Transparent

0.92ct Orange Fire Opal, Oval, Transparent

8.2 x 6.3 mm

$ 26.20

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1.93ct Violet Amethyst, Heart, Transparent

1.93ct Violet Amethyst, Heart, Transparent

8 x 8 mm (calibrated)

$ 13.45

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7.68ct Violet Amethyst, Pear Shape, VVS-VS

7.68ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 58.91

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2.07ct Orange Hessonite Garnet, Oval, VS-SI

2.07ct Orange Hessonite Garnet, Oval, VS-SI

8.4 x 6.9 mm

$ 45.36

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23.94ct Green Jadeite, Oval, Translucent

23.94ct Green Jadeite, Oval, Translucent

25.6 x 20.7 mm

$ 52.46

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20.08ct Multicolor Jasper, Oval, Translucent

20.08ct Multicolor Jasper, Oval, Translucent

20 x 15 mm (calibrated)

$ 17.16

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1.45ctw Green Demantoid Garnet, Oval, VS

1.45ctw Green Demantoid Garnet, Oval, VS

4.9 x 3.8 mm

$ 158.86

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0.86ct Orange Hessonite Garnet, Square, VS

0.86ct Orange Hessonite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 15.01

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2.82ctw Yellow Citrine, Emerald Cut, VS

2.82ctw Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 21.62

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22.84ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

22.84ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

23.9 x 18.6 mm

$ 10.24

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3.82ctw Violet Amethyst, Oval, VVS-VS

3.82ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 20.92

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51.41ct Pink Rose Quartz, Oval, Transparent

51.41ct Pink Rose Quartz, Oval, Transparent

26.3 x 21.7 mm

$ 92.37

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5.04ct Multicolor Rainbow Pyrite, Fancy, Opaque

5.04ct Multicolor Rainbow Pyrite, Fancy, Opaque

18.2 x 14.6 mm

$ 15.06

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0.62ct Orange Sphalerite, Round, SI

0.62ct Orange Sphalerite, Round, SI

5 mm (calibrated)

$ 30.88

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0.69ct Yellow Citrine, Heart, VVS-VS

0.69ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 5.49

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2.54ctw Red Pyrope Garnet, Marquise, VVS-VS

2.54ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.2 mm

$ 22.26

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5.38ct Brown Tiger'S Eye, Oval, Opaque

5.38ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 3.15

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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

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
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Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
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Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
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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

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
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