Untreated Gemstones
Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.
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Bi-color
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Black
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Blue
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Brown
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Gray
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Green
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Multicolor Untreated Gemstones
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Orange
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Pink
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Purple
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Red
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Turquoise Untreated Gemstones
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Violet
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White
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Yellow
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Single |
Pairs |
Lots |
Faceted |
Cabochons |
22.49ct Turquoise Turquoise, Oval, Opaque
24.5 x 15.5 mm
$ 80.96
21.31ct Turquoise Turquoise, Oval, Opaque
22.1 x 13.5 mm
$ 76.72
36.79ct Turquoise Turquoise, Oval, Opaque
27 x 20 mm (calibrated)
$ 132.44
27.39ct Turquoise Turquoise, Oval, Opaque
24.8 x 17 mm
$ 98.60
23.40ct Turquoise Turquoise, Oval, Opaque
22.9 x 14.8 mm
$ 70.20
52.75ct Turquoise Turquoise, Oval, Opaque
30 x 22.9 mm
$ 189.90
27.18ct Turquoise Turquoise, Oval, Opaque
25 x 18 mm (calibrated)
$ 97.85
27.38ct Turquoise Turquoise, Oval, Opaque
27.2 x 17.9 mm
$ 98.57
37.69ct Turquoise Turquoise, Oval, Opaque
27 x 20 mm (calibrated)
$ 135.68
22.46ct Turquoise Turquoise, Oval, Opaque
25.2 x 16.6 mm
$ 80.86
24.84ct Turquoise Turquoise, Oval, Opaque
24.3 x 16.1 mm
$ 89.42
40.55ct Turquoise Turquoise, Oval, Opaque
29.4 x 17.1 mm
$ 145.98
27.07ct Turquoise Turquoise, Oval, Opaque
22.9 x 17.4 mm
$ 97.45
23.63ct Turquoise Turquoise, Oval, Opaque
25.8 x 17.4 mm
$ 85.07
42.37ct Turquoise Turquoise, Oval, Opaque
25.7 x 18.9 mm
$ 152.53
38.54ct Turquoise Turquoise, Oval, Opaque
25.6 x 18.8 mm
$ 115.62
20.57ct Turquoise Turquoise, Oval, Opaque
21.8 x 16.8 mm
$ 74.05
24.07ct Turquoise Turquoise, Oval, Opaque
19.7 x 15.7 mm
$ 86.65
58.82ct Turquoise Turquoise, Oval, Opaque
35.3 x 22.3 mm
$ 211.75
29.13ct Turquoise Turquoise, Oval, Opaque
25.4 x 16.9 mm
$ 104.87
45.91ct Turquoise Turquoise, Oval, Opaque
33 x 17.2 mm
$ 165.28
23.62ct Turquoise Turquoise, Oval, Opaque
26.3 x 18.8 mm
$ 85.03
33.66ct Turquoise Turquoise, Oval, Opaque
26.6 x 18.1 mm
$ 121.18
48.31ct Turquoise Turquoise, Oval, Opaque
28.8 x 21.2 mm
$ 173.92
Why Buy Untreated Gemstones from GemSelect?
- Trusted Worldwide Since 2003
- Supplying natural gemstones to jewelers and collectors in 120+ countries
- Verified natural gemstones
- View All GemSelect Reviews on Bizrate
- Secure checkout and insured worldwide delivery
- 30-day returns and satisfaction guarantee
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.
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 
Excellent options
Overall Rating -> 10
My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.
Overall Rating -> 10
I was able to find what I wanted very easily!
Overall Rating -> 8 
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.
Overall Rating -> 10
Great site for finding specific stones and sizes for individual pieces of jewelry
Overall Rating -> 10
The stones are very nice.
