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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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0.91ctw White Rainbow Moonstone, Oval, Transparent

0.91ctw White Rainbow Moonstone, Oval, Transparent

6 x 4 mm (calibrated)

$ 29.92

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37.21ct Green Amazonite, Fancy, Opaque

37.21ct Green Amazonite, Fancy, Opaque

42.1 x 10.8 mm

$ 7.41

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4.78ct Turquoise Fluorite, Pear Shape, Transparent

4.78ct Turquoise Fluorite, Pear Shape, Transparent

14 x 8.2 mm

$ 20.38

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11.71ct Gray Jadeite, Oval, Translucent

11.71ct Gray Jadeite, Oval, Translucent

16.6 x 14 mm

$ 38.49

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2.30ctw Red Pyrope Garnet, Marquise, VVS-VS

2.30ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5.1 mm

$ 20.16

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1.66ct Yellow Citrine, Emerald Cut, VVS

1.66ct Yellow Citrine, Emerald Cut, VVS

8.1 x 6.3 mm

$ 13.23

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0.93ct Orange Hessonite Garnet, Cushion, VS-SI

0.93ct Orange Hessonite Garnet, Cushion, VS-SI

6 x 6 mm (calibrated)

$ 41.52

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1.07ct Yellow Citrine, Trillion, VS

1.07ct Yellow Citrine, Trillion, VS

7 x 7 mm (calibrated)

$ 8.21

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0.48ct Orange Citrine, Marquise, VS

0.48ct Orange Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 3.34

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2.92ct Red Almandine Garnet, Oval, VVS-VS

2.92ct Red Almandine Garnet, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 84.83

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36.27ct Green Serpentine, Oval, Translucent

36.27ct Green Serpentine, Oval, Translucent

26.9 x 24.1 mm

$ 77.67

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0.20ct Green Kornerupine, Round, VS

0.20ct Green Kornerupine, Round, VS

3.7 mm

$ 9.13

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3.32ctw Yellow Citrine, Emerald Cut, VVS-VS

3.32ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 25.46

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1.17ct Yellow Color-Change Diaspore, Emerald Cut, VS

1.17ct Yellow Color-Change Diaspore, Emerald Cut, VS

10.1 x 4.2 mm

$ 61.22

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26.21ctw Multicolor Labradorite, Oval, Translucent

26.21ctw Multicolor Labradorite, Oval, Translucent

22.5 x 16.3 mm

$ 57.43

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7.21ct Multicolor Labradorite, Pear Shape, Translucent

7.21ct Multicolor Labradorite, Pear Shape, Translucent

14 x 10 mm (calibrated)

$ 15.94

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10.37ct White Rainbow Moonstone, Pear Shape, Transparent

10.37ct White Rainbow Moonstone, Pear Shape, Transparent

18.3 x 12.2 mm

$ 185.91

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8.55ct Violet Amethyst, Pear Shape, VS

8.55ct Violet Amethyst, Pear Shape, VS

18 x 13 mm (calibrated)

$ 67.26

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0.89ct Yellow Beryl, Trillion, VVS-VS

0.89ct Yellow Beryl, Trillion, VVS-VS

7.8 x 7.6 mm

$ 17.73

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1.72ct Orange Hessonite Garnet, Round, VVS-VS

1.72ct Orange Hessonite Garnet, Round, VVS-VS

7 mm (calibrated)

$ 29.12

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4.64ct Yellow Citrine, Oval, VS

4.64ct Yellow Citrine, Oval, VS

13 x 9 mm (calibrated)

$ 28.12

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14.55ct Black Nuummite, Oval, Opaque

14.55ct Black Nuummite, Oval, Opaque

21 x 11.1 mm

$ 63.91

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1.26ct Green Tourmaline, Emerald Cut, VS

1.26ct Green Tourmaline, Emerald Cut, VS

14.1 x 3.3 mm

$ 34.51

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0.69ct Green Tourmaline, Emerald Cut, VVS

0.69ct Green Tourmaline, Emerald Cut, VVS

8.9 x 3.4 mm

$ 34.36

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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

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
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Overall Rating -> 10 star ratings

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
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Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
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Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
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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
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Overall Rating -> 10 star ratings

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

Posted By Love It! in July, 2025
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