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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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11.64ctw Green Amazonite, Round, Opaque

11.64ctw Green Amazonite, Round, Opaque

8 mm (calibrated)

$ 28.44

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2.27ct Red Almandine Garnet, Oval, VS

2.27ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 84.78

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2.27ct Multicolor Spectrolite, Oval, Opaque

2.27ct Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 10.38

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17.57ctw Green Prehnite, Flower Cut, Translucent

17.57ctw Green Prehnite, Flower Cut, Translucent

18.8 x 12.8 mm

$ 26.58

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60.37ct Multicolor Rhodonite, Oval, Opaque

60.37ct Multicolor Rhodonite, Oval, Opaque

39.8 x 25.2 mm

$ 34.87

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9.33ct Black Tourmaline, Baguette, Opaque

9.33ct Black Tourmaline, Baguette, Opaque

16.3 x 8.8 mm

$ 46.46

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2.42ct Brown Smoky Quartz, Oval, VVS

2.42ct Brown Smoky Quartz, Oval, VVS

10 x 8 mm (calibrated)

$ 14.46

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0.49ct Yellow Color-Change Diaspore, Cushion, VS

0.49ct Yellow Color-Change Diaspore, Cushion, VS

5.2 x 4.6 mm

$ 25.86

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1.29ct Green Tourmaline, Emerald Cut, VVS

1.29ct Green Tourmaline, Emerald Cut, VVS

15.4 x 3.2 mm

$ 35.34

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3.11ctw Red Pyrope Garnet, Trillion, VS

3.11ctw Red Pyrope Garnet, Trillion, VS

4 x 4 mm (calibrated)

$ 23.85

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1.76ctw Multicolor Andalusite, Oval, VS

1.76ctw Multicolor Andalusite, Oval, VS

6 x 4 mm (calibrated)

$ 94.36

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3.64ct Pink Strawberry Quartz, Oval, Transparent

3.64ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 27.30

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40.77ct Multicolor Jasper, Oval, Opaque

40.77ct Multicolor Jasper, Oval, Opaque

36.7 x 23.7 mm

$ 44.67

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3.30ct Red Zircon, Oval, VVS
Zircon Product Video (318555)

3.30ct Red Zircon, Oval, VVS

9 x 7 mm (calibrated)

$ 132.57

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4.75ctw Orange Sunstone, Round, Translucent

4.75ctw Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 28.10

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0.72ct Green Peridot, Marquise, VS

0.72ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 11.47

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3.92ctw Red Pyrope Garnet, Marquise, VVS-VS

3.92ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 34.36

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1.32ct Brown Color-Change Garnet, Oval, VVS-VS

1.32ct Brown Color-Change Garnet, Oval, VVS-VS

7.3 x 5.7 mm

$ 105.46

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1.72ct Yellow Citrine, Trillion, VVS-VS

1.72ct Yellow Citrine, Trillion, VVS-VS

8.3 x 8.1 mm

$ 10.65

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2.62ct Violet Amethyst, Trillion, VVS-VS

2.62ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.63

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1.71ct Green Tourmaline, Emerald Cut, VVS-VS

1.71ct Green Tourmaline, Emerald Cut, VVS-VS

16.7 x 3.7 mm

$ 41.22

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4.13ct Yellow Cat'S Eye Opal, Oval, Opaque

4.13ct Yellow Cat'S Eye Opal, Oval, Opaque

11 x 9 mm (calibrated)

$ 12.34

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 10.27

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2.22ct Red Coral, Oval, Opaque
Coral Product Video (499216)

2.22ct Red Coral, Oval, Opaque

13.5 x 5.1 mm

$ 364.83

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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

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

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.

Posted By Mattick in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate
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