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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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Yellow Untreated Gemstones
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9.32ct Pink Morganite, Pear Shape, Transparent

20.6 x 11 mm

$ 102.11

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1.74ctw Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 114.38

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23.50ct Gray Hematite, Heart, Opaque

20.3 x 19.1 mm

$ 51.49

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1.04ct Yellow Sphalerite, Oval, SI-I1

7 x 5 mm (calibrated)

$ 51.79

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22.65ct Green Tsavorite Garnet, Trillion, Opaque

19 x 19 mm (calibrated)

$ 496.31

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9.91ctw White Quartz Cat'S Eye, Round, Transparent

10 mm (calibrated)

$ 35.29

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15.17ct Green Apatite, Emerald Cut, VS-SI

14 x 14 mm (calibrated)

$ 560.86

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13.66ct Purple Kunzite, Pear Shape, VVS-VS

16.9 x 10.2 mm

$ 375.92

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11.83ct Blue Chalcedony, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 29.47

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0.11ct Black Diamond, Square, Opaque

2.4 x 2.3 mm

$ 46.29

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0.30ctw White Diamond, Fancy, VVS

3.2 x 1.8 mm

$ 1,018.55

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4.61ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 21.07

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0.15ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 272.54

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23.14ct Multicolor Quartz With Marcasite, Oval, Transparent

23.8 x 16.1 mm

$ 152.11

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18.52ct Black Obsidian, Pear Shape, Opaque

22.5 x 19.4 mm

$ 13.84

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7.51ct Multicolor Coral, Round, Translucent

14 mm (calibrated)

$ 23.77

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3.56ct Green Sphene, Oval, Translucent

10.5 x 8.3 mm

$ 21.33

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11.09ct Purple Kunzite, Trillion, VS

16.7 x 13 mm

$ 313.23

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63.97ct Multicolor Rhodochrosite, Oval, Opaque

39.9 x 25.6 mm

$ 109.33

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94.13ct Multicolor Jasper, Round, Opaque

41.5 mm

$ 54.38

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6.31ct Turquoise Grandidierite, Oval, SI-I1

13 x 11 mm (calibrated)

$ 283.45

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6.82ct Multicolor Fire Agate, Fancy, Translucent

12.7 x 11.4 mm

$ 53.49

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20.55ct Multicolor Boulder Opal, Pear Shape, Opaque

31.9 x 16.1 mm

$ 112.58

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34.00ct Green Maw-Sit-Sit, Round, Opaque

19 mm (calibrated)

$ 101.59

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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

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

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

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

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

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate
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