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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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25.11ct Multicolor Ruby-Zoisite, Flower Cut, Opaque

25.11ct Multicolor Ruby-Zoisite, Flower Cut, Opaque

25.3 x 16.8 mm

$ 32.74

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7.91ct Green Jadeite, Round, Translucent

7.91ct Green Jadeite, Round, Translucent

12 mm (calibrated)

$ 26.00

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5.19ct Turquoise Aquamarine, Oval, Translucent

5.19ct Turquoise Aquamarine, Oval, Translucent

14 x 10 mm (calibrated)

$ 107.69

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2.48ct Orange Hessonite Garnet, Oval, VS

2.48ct Orange Hessonite Garnet, Oval, VS

9.3 x 7.6 mm

$ 54.34

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0.30ct Orange Spessartite Garnet, Baguette, SI

0.30ct Orange Spessartite Garnet, Baguette, SI

4.2 x 3.1 mm

$ 10.16

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0.97ct Brown Color-Change Garnet, Emerald Cut, VS

0.97ct Brown Color-Change Garnet, Emerald Cut, VS

5.4 x 4.6 mm

$ 77.49

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1.13ct White Sillimanite Cat'S Eye, Oval, Transparent

1.13ct White Sillimanite Cat'S Eye, Oval, Transparent

6.7 x 4.7 mm

$ 3.53

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0.98ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.98ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6.7 x 4.4 mm

$ 30.06

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1.10ct Yellow Beryl, Oval, VVS-VS

1.10ct Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 21.91

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3.87ct Yellow Citrine, Oval, VVS-VS

3.87ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 30.83

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12.37ctw Violet Amethyst, Oval, Transparent

12.37ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 67.77

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66.01ct Black Obsidian, Square, Opaque

66.01ct Black Obsidian, Square, Opaque

26.3 x 26.2 mm

$ 54.79

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1.42ct Orange Hessonite Garnet, Emerald Cut, VS

1.42ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 23.34

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1.87ct Orange Hessonite Garnet, Oval, VS-SI

1.87ct Orange Hessonite Garnet, Oval, VS-SI

8.6 x 6.9 mm

$ 34.13

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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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11.05ct Multicolor Rainbow Pyrite, Oval, Opaque

11.05ct Multicolor Rainbow Pyrite, Oval, Opaque

19 x 12.2 mm

$ 28.50

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2.58ctw Green Peridot, Round, VVS-VS

2.58ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 42.40

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13.42ct Green Bloodstone, Round, Opaque

13.42ct Green Bloodstone, Round, Opaque

14 mm (calibrated)

$ 29.40

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3.49ct Orange Sunstone, Round, Transparent

3.49ct Orange Sunstone, Round, Transparent

10 mm (calibrated)

$ 20.35

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7.40ct Green Chrysoprase, Oval, Opaque

7.40ct Green Chrysoprase, Oval, Opaque

13.1 x 12.1 mm

$ 61.42

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0.58ct Yellow Spessartite Garnet, Oval, VS

0.58ct Yellow Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 19.26

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7.24ct Pink Strawberry Quartz, Oval, Translucent

7.24ct Pink Strawberry Quartz, Oval, Translucent

16 x 12 mm (calibrated)

$ 45.53

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0.96ct Green Peridot, Oval, VS

0.96ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.69

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0.72ct Yellow Citrine, Pear Shape, VVS

0.72ct Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 3.59

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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 and functional

Posted By Dessa in March, 2026
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

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate

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 -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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