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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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1.06ct Blue Kyanite, Oval, VS

1.06ct Blue Kyanite, Oval, VS

7 x 5 mm (calibrated)

$ 22.06

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15.52ct Multicolor Jasper, Oval, Opaque

15.52ct Multicolor Jasper, Oval, Opaque

24 x 14.7 mm

$ 17.00

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1.79ct Orange Hessonite Garnet, Square, VS-SI

1.79ct Orange Hessonite Garnet, Square, VS-SI

6.6 x 6.6 mm

$ 31.23

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0.45ct Yellow Citrine, Heart, VVS

0.45ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 2.99

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33.26ct White Aragonite, Square, Opaque

33.26ct White Aragonite, Square, Opaque

23.4 x 21.9 mm

$ 38.93

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2.34ct Yellow Citrine, Flower Cut, Transparent

2.34ct Yellow Citrine, Flower Cut, Transparent

8.5 x 8.3 mm

$ 17.94

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6.41ct Violet Amethyst, Oval, Transparent

6.41ct Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 35.12

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4.30ct Green Jadeite, Oval, Opaque

4.30ct Green Jadeite, Oval, Opaque

12 x 10 mm (calibrated)

$ 32.46

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1.35ct Yellow Citrine, Cushion, VVS

1.35ct Yellow Citrine, Cushion, VVS

8 x 6 mm (calibrated)

$ 10.08

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0.77ct Gray Sillimanite Cat'S Eye, Oval, Opaque

0.77ct Gray Sillimanite Cat'S Eye, Oval, Opaque

6.3 x 4 mm

$ 2.53

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1.58ctw Yellow Citrine, Heart, VVS

1.58ctw Yellow Citrine, Heart, VVS

6 x 6 mm (calibrated)

$ 12.59

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29.78ct Violet Amethyst, Oval, VVS

29.78ct Violet Amethyst, Oval, VVS

20.8 x 16.9 mm

$ 228.39

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5.82ct Violet Amethyst, Cushion, VS

5.82ct Violet Amethyst, Cushion, VS

18 x 9.1 mm

$ 34.78

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7.50ct Multicolor Rainbow Pyrite, Fancy, Opaque

7.50ct Multicolor Rainbow Pyrite, Fancy, Opaque

20 x 15 mm (calibrated)

$ 19.42

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5.52ctw Violet Amethyst, Oval, Transparent

5.52ctw Violet Amethyst, Oval, Transparent

10 x 8 mm (calibrated)

$ 30.24

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2.11ct Orange Hessonite Garnet, Emerald Cut, VS

2.11ct Orange Hessonite Garnet, Emerald Cut, VS

8.1 x 7.4 mm

$ 46.23

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6.84ct Brown Star Moonstone, Oval, Translucent

6.84ct Brown Star Moonstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 29.98

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1.19ct Pink Tourmaline, Emerald Cut, SI

1.19ct Pink Tourmaline, Emerald Cut, SI

9.8 x 4.3 mm

$ 89.96

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19.64ctw Multicolor Jasper, Oval, Opaque

19.64ctw Multicolor Jasper, Oval, Opaque

18 x 13 mm (calibrated)

$ 21.51

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40.98ct Red Star Garnet, Round, Opaque

40.98ct Red Star Garnet, Round, Opaque

17 mm (calibrated)

$ 40.40

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1.14ct Green Tourmaline, Emerald Cut, VS

1.14ct Green Tourmaline, Emerald Cut, VS

11.9 x 3.6 mm

$ 28.39

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1.56ct Yellow Citrine, Square, VVS-VS

1.56ct Yellow Citrine, Square, VVS-VS

7 x 7 mm (calibrated)

$ 10.26

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22.79ct Gray Hematite, Baguette, Opaque

22.79ct Gray Hematite, Baguette, Opaque

20.2 x 14 mm

$ 20.97

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0.41ct Yellow Spessartite Garnet, Oval, VS-SI

0.41ct Yellow Spessartite Garnet, Oval, VS-SI

5 x 4 mm (calibrated)

$ 14.29

View Gem
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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

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 -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
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

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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