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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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1.52ctw Blue Kyanite, Oval, VS-SI

1.52ctw Blue Kyanite, Oval, VS-SI

4.9 x 3.2 mm

$ 33.31

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12.53ct Green Peridot, Cushion, VVS-VS
Peridot Product Video (746918)

12.53ct Green Peridot, Cushion, VVS-VS

13.5 x 12.7 mm

$ 3,119.97

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0.44ct Yellow Citrine, Oval, VVS-VS

0.44ct Yellow Citrine, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 3.07

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1.54ct Orange Zircon, Round, VVS-VS

1.54ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 36.74

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5.08ct Violet Amethyst, Pear Shape, VVS

5.08ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 36.90

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3.15ctw Red Pyrope Garnet, Marquise, VVS-VS

3.15ctw Red Pyrope Garnet, Marquise, VVS-VS

11.8 x 6 mm

$ 34.61

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0.78ct Brown Tiger'S Eye, Pear Shape, Opaque

0.78ct Brown Tiger'S Eye, Pear Shape, Opaque

6.1 x 5.7 mm

$ 1.00

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0.60ct Yellow Spessartite Garnet, Oval, VS-SI

0.60ct Yellow Spessartite Garnet, Oval, VS-SI

5.1 x 4.1 mm

$ 19.92

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3.45ctw Violet Amethyst, Oval, VVS-VS

3.45ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.74

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0.92ct Pink Morganite, Pear Shape, VVS-VS

0.92ct Pink Morganite, Pear Shape, VVS-VS

8 x 6 mm (calibrated)

$ 38.18

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0.80ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.80ct Yellow Color-Change Diaspore, Emerald Cut, VS

6.3 x 4.7 mm

$ 26.29

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2.17ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.17ctw White Sillimanite Cat'S Eye, Oval, Translucent

7.3 x 4.6 mm

$ 7.13

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13.43ct Turquoise Larimar, Oval, Opaque
Larimar Product Video (673936)

13.43ct Turquoise Larimar, Oval, Opaque

20 x 15 mm (calibrated)

$ 160.35

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14.32ct Blue Aquamarine, Oval, Translucent

14.32ct Blue Aquamarine, Oval, Translucent

18 x 13 mm (calibrated)

$ 297.14

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0.58ct Orange Citrine, Marquise, VS

0.58ct Orange Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 4.04

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7.62ct Violet Amethyst, Pear Shape, VS

7.62ct Violet Amethyst, Pear Shape, VS

16 x 12 mm (calibrated)

$ 58.43

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1.91ct Pink Strawberry Quartz, Oval, Translucent

1.91ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 9.55

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1.63ct Yellow Sphene, Oval, Transparent

1.63ct Yellow Sphene, Oval, Transparent

7.2 x 6.3 mm

$ 8.12

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3.68ct Yellow Citrine, Oval, VVS-VS

3.68ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 28.23

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4.58ct Pink Morganite, Oval, Transparent

4.58ct Pink Morganite, Oval, Transparent

11.8 x 9 mm

$ 50.18

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29.36ct Green Aventurine, Oval, Translucent

29.36ct Green Aventurine, Oval, Translucent

31.5 x 19.9 mm

$ 29.24

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0.99ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.99ct Yellow Color-Change Diaspore, Emerald Cut, VS

6 x 5.3 mm

$ 30.37

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15.62ct Green Malachite, Oval, Opaque

15.62ct Green Malachite, Oval, Opaque

18 x 13 mm (calibrated)

$ 11.99

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1.39ct Pink Tourmaline, Cushion, VS

1.39ct Pink Tourmaline, Cushion, VS

6.8 x 6.3 mm

$ 207.67

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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

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was easy to navigate

Posted By GemGod in July, 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

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
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 -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate
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