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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
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Untreated Gemstones Treatment

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2.79ctw Yellow Golden Beryl, Oval, VS

2.79ctw Yellow Golden Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 61.14

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1.57ctw Red Pyrope Garnet, Square, VS

1.57ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.04

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18.58ct White Rainbow Moonstone, Fancy, Transparent

18.58ct White Rainbow Moonstone, Fancy, Transparent

25 x 13.8 mm

$ 148.05

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1.20ct Brown Kornerupine, Oval, VVS-VS

1.20ct Brown Kornerupine, Oval, VVS-VS

7.4 x 5.8 mm

$ 99.60

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2.71ctw Yellow Golden Beryl, Oval, VVS-VS

2.71ctw Yellow Golden Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 59.38

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14.97ct Green Prehnite, Fancy, Transparent

14.97ct Green Prehnite, Fancy, Transparent

18.9 x 12.2 mm

$ 25.91

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6.12ct Brown Tiger'S Eye, Baguette, Opaque

6.12ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 6.09

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0.64ct Orange Fire Opal, Round, Transparent

0.64ct Orange Fire Opal, Round, Transparent

6 mm (calibrated)

$ 22.31

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9.84ctw Yellow Rutile Quartz, Oval, Transparent

9.84ctw Yellow Rutile Quartz, Oval, Transparent

13 x 9 mm (calibrated)

$ 26.95

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0.64ct Red Pyrope Garnet, Heart, VS

0.64ct Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 5.10

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2.01ct Violet Amethyst, Marquise, VVS

2.01ct Violet Amethyst, Marquise, VVS

20.3 x 5.1 mm

$ 14.01

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4.23ctw Red Almandine Garnet, Oval, VVS-VS

4.23ctw Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 157.99

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0.58ct Violet Amethyst, Emerald Cut, VS

0.58ct Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 3.37

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1.58ct Orange Citrine, Pear Shape, VVS-VS

1.58ct Orange Citrine, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 13.11

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2.48ct Orange Hessonite Garnet, Oval, VS-SI

2.48ct Orange Hessonite Garnet, Oval, VS-SI

9.2 x 7.4 mm

$ 54.34

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1.59ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.59ct Gray Sillimanite Cat'S Eye, Oval, Transparent

8.1 x 4.8 mm

$ 5.23

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1.55ctw Red Pyrope Garnet, Square, VS

1.55ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.89

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0.81ct Purple Spinel, Cushion, VS
Spinel Product Video (691932)

0.81ct Purple Spinel, Cushion, VS

5 x 5 mm (calibrated)

$ 56.47

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2.64ct Multicolor Labradorite, Baguette, Transparent/Translucent

2.64ct Multicolor Labradorite, Baguette, Transparent/Translucent

9 x 7 mm (calibrated)

$ 3.63

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1.80ct Violet Amethyst, Pear Shape, VVS-VS

1.80ct Violet Amethyst, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 13.80

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11.24ctw Violet Amethyst, Oval, Transparent

11.24ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 61.57

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0.92ct Orange Hessonite Garnet, Pear Shape, SI

0.92ct Orange Hessonite Garnet, Pear Shape, SI

7.4 x 5.5 mm

$ 17.13

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20.58ct Brown Star Sunstone, Oval, Opaque
Star Sunstone Product Video (752687)

20.58ct Brown Star Sunstone, Oval, Opaque

17.4 x 15.7 mm

$ 170.81

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1.37ct Orange Hessonite Garnet, Emerald Cut, VS

1.37ct Orange Hessonite Garnet, Emerald Cut, VS

7.5 x 4.8 mm

$ 23.04

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!

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I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

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Posted By Jim in January, 2026
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Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
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