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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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44.38ct Black Nuummite, Oval, Opaque

44.38ct Black Nuummite, Oval, Opaque

34.5 x 15.5 mm

$ 185.74

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3.42ct Yellow Citrine, Oval, VS

3.42ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 21.36

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0.53ct Yellow Sphalerite, Round, SI

0.53ct Yellow Sphalerite, Round, SI

4.5 mm (calibrated)

$ 26.39

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1.58ct Green Tourmaline, Emerald Cut, VS

1.58ct Green Tourmaline, Emerald Cut, VS

16.3 x 3.4 mm

$ 43.28

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2.15ctw White Sillimanite Cat'S Eye, Oval, Transparent

2.15ctw White Sillimanite Cat'S Eye, Oval, Transparent

7.1 x 4.7 mm

$ 7.07

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1.22ctw Orange Zircon, Oval, VVS-VS

1.22ctw Orange Zircon, Oval, VVS-VS

5.1 x 4.1 mm

$ 30.38

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0.45ct Red Spinel, Pear Shape, VS-SI

0.45ct Red Spinel, Pear Shape, VS-SI

5.6 x 4 mm

$ 37.35

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0.29ct Orange Sphalerite, Round, VS-SI

0.29ct Orange Sphalerite, Round, VS-SI

3.8 mm

$ 14.44

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7.35ctw White Topaz, Square, VVS-VS
Topaz Product Video (341388)

7.35ctw White Topaz, Square, VVS-VS

5 x 5 mm (calibrated)

$ 58.86

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0.73ct Green Peridot, Pear Shape, VS

0.73ct Green Peridot, Pear Shape, VS

7 x 5 mm (calibrated)

$ 5.09

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40.86ct Blue Turquoise, Oval, Opaque

40.86ct Blue Turquoise, Oval, Opaque

28.5 x 20.1 mm

$ 122.09

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5.49ct White Topaz, Oval, Transparent

5.49ct White Topaz, Oval, Transparent

12 x 10 mm (calibrated)

$ 30.08

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13.03ct Multicolor Boulder Opal, Cushion, Opaque

13.03ct Multicolor Boulder Opal, Cushion, Opaque

20 x 15 mm (calibrated)

$ 71.38

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37.20ct White Dendritic Agate, Pear Shape, Opaque

37.20ct White Dendritic Agate, Pear Shape, Opaque

37.3 x 24 mm

$ 25.94

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21.56ct White Howlite, Cushion, Opaque

21.56ct White Howlite, Cushion, Opaque

25 x 18 mm (calibrated)

$ 10.09

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2.32ctw Green Peridot, Round, VVS-VS

2.32ctw Green Peridot, Round, VVS-VS

5 mm (calibrated)

$ 38.13

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3.24ctw White Rainbow Moonstone, Square, Transparent

3.24ctw White Rainbow Moonstone, Square, Transparent

3.2 x 3.2 mm

$ 60.35

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3.67ct Pink Morganite, Round, Transparent

3.67ct Pink Morganite, Round, Transparent

9.5 mm (calibrated)

$ 42.18

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13.48ct Multicolor Agate, Round, Opaque

13.48ct Multicolor Agate, Round, Opaque

13 mm (calibrated)

$ 10.74

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2.87ct Orange Hessonite Garnet, Oval, VS

2.87ct Orange Hessonite Garnet, Oval, VS

9.4 x 8 mm

$ 47.17

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14.58ct Blue Chalcedony, Pear Shape, Opaque

14.58ct Blue Chalcedony, Pear Shape, Opaque

22.2 x 15.4 mm

$ 36.30

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0.47ct Blue Kyanite, Round, SI

0.47ct Blue Kyanite, Round, SI

4.2 mm

$ 11.70

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4.69ct Violet Amethyst, Pear Shape, VVS

4.69ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 30.83

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17.50ct Orange Druzy Citrine, Pear Shape, Opaque

17.50ct Orange Druzy Citrine, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 30.88

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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

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
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Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
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Overall Rating -> 10 star ratings

love the site, the experience and the products.

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

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate
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