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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
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26.45ct Black Nuummite, Emerald Cut, Opaque

18.9 x 16.9 mm

$ 116.18

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1.31ctw Orange Citrine, Oval, VS

7 x 5 mm (calibrated)

$ 13.05

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8.28ct Green Chrysoprase, Baguette, Opaque

14.5 x 10.7 mm

$ 103.09

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1.24ct Yellow Color-Change Diaspore, Cushion, VS

6.3 x 6.1 mm

$ 65.45

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18.72ct Violet Amethyst, Emerald Cut, VVS-VS

18.3 x 14.1 mm

$ 130.52

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11.77ct Multicolor Agate, Oval, Opaque

15.5 x 12.6 mm

$ 11.72

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7.33ct Blue Aquamarine, Oval, Translucent

16.9 x 10.7 mm

$ 152.10

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0.95ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.62

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6.62ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 26.19

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3.79ctw White Topaz, Square, SI

3.5 x 3.5 mm

$ 29.07

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15.21ct Green Serpentine, Oval, Translucent

25 x 18 mm (calibrated)

$ 32.57

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70.80ct Violet Amethyst, Pear Shape, VVS

30.5 x 29.9 mm

$ 564.13

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16.21ctw Multicolor Fossil Coral, Pear Shape, Opaque

19.2 x 11.1 mm

$ 35.17

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10.68ct Pink Kunzite, Emerald Cut, VVS

14.5 x 9.4 mm

$ 281.88

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26.95ct Violet Amethyst, Emerald Cut, VVS

20 x 16 mm

$ 154.61

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0.86ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 7.71

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2.34ct Violet Sapphire, Oval, VS-SI

9.5 x 7.8 mm

$ 936.00

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2.10ct Purple Kunzite, Emerald Cut, VS

6.5 x 6.3 mm

$ 57.78

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1.45ct Green Tourmaline, Emerald Cut, VVS-VS

16.7 x 3.4 mm

$ 38.13

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17.75ct Green Druzy Variscite, Fancy, Opaque

29.1 x 17.8 mm

$ 75.31

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5.14ct Gray Jadeite, Oval, Translucent

14.4 x 9.4 mm

$ 16.89

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3.16ctw Yellow Golden Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 76.16

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5.35ct White Topaz, Oval, VVS

12.1 x 9.1 mm

$ 35.17

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2.19ctw Pink Morganite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 143.96

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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

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
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Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

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Very good

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Overall Rating -> 9 star ratings

It was great!

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Overall Rating -> 10 star ratings

the selection is good as are the prices

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

Easy to use website

Posted By Mel in February, 2026
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