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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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8.20ct Brown Smoky Quartz, Emerald Cut, VVS-VS

8.20ct Brown Smoky Quartz, Emerald Cut, VVS-VS

14 x 14 mm (calibrated)

$ 33.07

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34.77ct Multicolor Pietersite, Oval, Translucent

34.77ct Multicolor Pietersite, Oval, Translucent

40.6 x 30.8 mm

$ 88.40

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7.57ctw Red Almandine Garnet, Oval, VVS-VS

7.57ctw Red Almandine Garnet, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 263.89

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0.71ct Pink Morganite, Pear Shape, VS

0.71ct Pink Morganite, Pear Shape, VS

8.9 x 4.3 mm

$ 62.23

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2.86ct Violet Amethyst, Trillion, VS

2.86ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.43

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4.96ctw Red Pyrope Garnet, Pear Shape, VVS-VS

4.96ctw Red Pyrope Garnet, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 38.04

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5.07ct Violet Amethyst, Pear Shape, VVS-VS

5.07ct Violet Amethyst, Pear Shape, VVS-VS

14 x 10 mm (calibrated)

$ 38.89

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4.59ctw Pink Rose Quartz, Emerald Cut, Transparent

4.59ctw Pink Rose Quartz, Emerald Cut, Transparent

8 x 8 mm (calibrated)

$ 25.15

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10.91ctw Yellow Rutile Quartz, Round, Transparent

10.91ctw Yellow Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 29.77

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1.26ct Yellow Beryl, Trillion, VVS-VS

1.26ct Yellow Beryl, Trillion, VVS-VS

8 x 7.5 mm

$ 25.10

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2.97ct Green Malachite, Oval, Opaque

2.97ct Green Malachite, Oval, Opaque

9 x 7 mm (calibrated)

$ 2.28

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21.41ct White Agate, Oval, Opaque

21.41ct White Agate, Oval, Opaque

25 x 18 mm (calibrated)

$ 33.91

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2.33ct Orange Moonstone, Cushion, Translucent

2.33ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 4.64

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2.04ctw Red Pyrope Garnet, Marquise, VVS-VS

2.04ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5 mm

$ 17.88

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21.70ct Black Nuummite, Oval, Opaque
Nuummite Product Video (645620)

21.70ct Black Nuummite, Oval, Opaque

18.5 x 15.9 mm

$ 89.04

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4.22ct Violet Amethyst, Pear Shape, VVS

4.22ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 30.66

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0.40ct Yellow Citrine, Cushion, VVS

0.40ct Yellow Citrine, Cushion, VVS

8 x 4.7 mm

$ 2.99

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1.45ct Orange Hessonite Garnet, Oval, VS

1.45ct Orange Hessonite Garnet, Oval, VS

7.5 x 6 mm

$ 22.66

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3.01ct Red Zircon, Oval, VVS-VS
Zircon Product Video (406595)

3.01ct Red Zircon, Oval, VVS-VS

8.9 x 6.7 mm

$ 154.04

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2.97ct Green Malachite, Oval, Opaque

2.97ct Green Malachite, Oval, Opaque

9 x 7 mm (calibrated)

$ 2.28

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22.95ct Yellow Obsidian, Pear Shape, Opaque

22.95ct Yellow Obsidian, Pear Shape, Opaque

28.9 x 19.2 mm

$ 20.12

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4.22ctw Yellow Citrine, Oval, VVS

4.22ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 23.12

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1.41ct Brown Kornerupine, Pear Shape, VVS

1.41ct Brown Kornerupine, Pear Shape, VVS

9.3 x 6.3 mm

$ 117.03

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1.89ct Yellow Citrine, Trillion, VVS-VS

1.89ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 14.49

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

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 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

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
Source: Bizrate
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