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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Golden
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Gray
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Green Untreated Gemstones
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Multicolor
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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 |
22.58ct Blue Turquoise, Oval, Opaque
26.5 x 15.2 mm
$ 67.47
27.44ct Blue Turquoise, Oval, Opaque
22.3 x 15.2 mm
$ 81.99
25.72ct Blue Turquoise, Oval, Opaque
26.1 x 17.1 mm
$ 76.85
36.79ct Blue Turquoise, Oval, Opaque
27 x 20 mm (calibrated)
$ 109.93
21.83ct Blue Turquoise, Oval, Opaque
23.3 x 15.9 mm
$ 65.23
24.84ct Blue Turquoise, Oval, Opaque
24.3 x 16.1 mm
$ 74.22
23.46ct Blue Turquoise, Oval, Opaque
22.4 x 20.7 mm
$ 70.10
59.90ct Blue Turquoise, Oval, Opaque
27.9 x 20.7 mm
$ 149.15
22.00ct Blue Turquoise, Oval, Opaque
24.1 x 16.3 mm
$ 65.74
25.93ct Blue Turquoise, Oval, Opaque
25 x 18 mm (calibrated)
$ 93.59
25.11ct Blue Turquoise, Oval, Opaque
23.9 x 13.6 mm
$ 75.03
22.49ct Blue Turquoise, Oval, Opaque
24.5 x 15.5 mm
$ 67.20
22.46ct Blue Turquoise, Oval, Opaque
25.2 x 16.6 mm
$ 67.11
31.22ct Blue Turquoise, Oval, Opaque
25 x 18 mm (calibrated)
$ 77.74
29.13ct Blue Turquoise, Oval, Opaque
25.4 x 16.9 mm
$ 87.04
58.82ct Blue Turquoise, Oval, Opaque
35.3 x 22.3 mm
$ 175.75
43.52ct Blue Turquoise, Oval, Opaque
29.7 x 20.1 mm
$ 130.04
17.65ct Blue Turquoise, Oval, Opaque
23.8 x 14.7 mm
$ 52.74
23.62ct Blue Turquoise, Oval, Opaque
26.3 x 18.8 mm
$ 70.57
36.21ct Blue Turquoise, Oval, Opaque
28.1 x 18.1 mm
$ 108.20
21.28ct Green Turquoise, Oval, Opaque
24.6 x 14 mm
$ 38.79
37.13ct Blue Turquoise, Oval, Opaque
27.6 x 20.9 mm
$ 110.95
33.66ct Blue Turquoise, Oval, Opaque
26.6 x 18.1 mm
$ 100.58
23.95ct Blue Turquoise, Oval, Opaque
21.8 x 16.4 mm
$ 71.56
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 -> 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 
The website has a good selection, the interface is very intuitive.
Overall Rating -> 8
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.
Overall Rating -> 10
Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!
Overall Rating -> 10
My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.
Overall Rating -> 10
I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.
