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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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10.46ct Green Maw-Sit-Sit, Round, Opaque

10.46ct Green Maw-Sit-Sit, Round, Opaque

14 mm (calibrated)

$ 32.32

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42.82ct Multicolor Labradorite, Oval, Opaque

42.82ct Multicolor Labradorite, Oval, Opaque

35 x 20.8 mm

$ 38.39

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0.02ct Black Diamond, Round, Opaque

0.02ct Black Diamond, Round, Opaque

1.9 mm (calibrated)

$ 15.94

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1.98ct Yellow Citrine, Round, VVS

1.98ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 13.80

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0.66ct Red Tourmaline, Round, Transparent

0.66ct Red Tourmaline, Round, Transparent

5.5 mm (calibrated)

$ 10.94

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1.17ct Red Pyrope Garnet, Marquise, VVS-VS

1.17ct Red Pyrope Garnet, Marquise, VVS-VS

10 x 5 mm (calibrated)

$ 10.26

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0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.6 x 5.1 mm

$ 22.83

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5.13ct Brown Moonstone, Round, Translucent

5.13ct Brown Moonstone, Round, Translucent

11 mm (calibrated)

$ 11.30

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2.48ctw Green Tsavorite Garnet, Pear Shape, VS

2.48ctw Green Tsavorite Garnet, Pear Shape, VS

4 x 3 mm (calibrated)

$ 130.77

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6.19ct Yellow Citrine, Oval, VVS

6.19ct Yellow Citrine, Oval, VVS

14 x 10 mm (calibrated)

$ 37.16

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2.50ct Green Prehnite, Pear Shape, Transparent

2.50ct Green Prehnite, Pear Shape, Transparent

10.5 x 8 mm

$ 13.59

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1.78ct Yellow Sphene, Oval, Transparent

1.78ct Yellow Sphene, Oval, Transparent

7.3 x 6.7 mm

$ 8.86

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1.44ct Yellow Citrine, Oval, Transparent

1.44ct Yellow Citrine, Oval, Transparent

10 x 8 mm (calibrated)

$ 11.05

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0.26ct Green Peridot, Marquise, VS
Peridot Product Video (573269)

0.26ct Green Peridot, Marquise, VS

6.1 x 3.1 mm

$ 1.87

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2.91ct Multicolor Labradorite, Baguette, Translucent

2.91ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 4.00

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4.05ctw Violet Amethyst, Oval, VVS-VS

4.05ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 22.19

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1.35ct Green Tourmaline, Emerald Cut, VS

1.35ct Green Tourmaline, Emerald Cut, VS

18 x 3.5 mm

$ 35.50

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7.47ct Brown Smoky Quartz, Emerald Cut, VVS-VS

7.47ct Brown Smoky Quartz, Emerald Cut, VVS-VS

12 x 12 mm (calibrated)

$ 40.93

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19.78ct Violet Amethyst, Emerald Cut, VVS-VS

19.78ct Violet Amethyst, Emerald Cut, VVS-VS

18.2 x 14.1 mm

$ 137.90

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17.61ct Pink Rose Quartz, Oval, Transparent

17.61ct Pink Rose Quartz, Oval, Transparent

18 x 13 mm (calibrated)

$ 23.54

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1.36ct Orange Sphalerite, Emerald Cut, SI

1.36ct Orange Sphalerite, Emerald Cut, SI

7 x 5 mm (calibrated)

$ 81.27

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21.41ctw Brown Rutile Quartz, Sphere / Ball, Translucent

21.41ctw Brown Rutile Quartz, Sphere / Ball, Translucent

8 mm (calibrated)

$ 23.46

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7.07ct Black Tourmaline, Emerald Cut, Opaque

7.07ct Black Tourmaline, Emerald Cut, Opaque

13 x 9 mm (calibrated)

$ 35.21

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1.17ctw Red Pyrope Garnet, Heart, VVS-VS

1.17ctw Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 29.13

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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

The website was very easy to use.

Posted By Garnet in January, 2026
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Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
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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

Very food

Posted By Keeto in July, 2025
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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 -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate
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