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 |
23.95ct Blue Turquoise, Oval, Opaque
21.8 x 16.4 mm
$ 71.56
45.72ct Blue Turquoise, Oval, Opaque
25.1 x 19.9 mm
$ 136.61
27.22ct Blue Turquoise, Round, Opaque
21.8 mm
$ 81.33
38.54ct Blue Turquoise, Oval, Opaque
25.6 x 18.8 mm
$ 95.96
27.18ct Blue Turquoise, Oval, Opaque
25 x 18 mm (calibrated)
$ 81.22
37.69ct Blue Turquoise, Oval, Opaque
27 x 20 mm (calibrated)
$ 112.61
26.38ct Blue Turquoise, Oval, Opaque
25.2 x 14.8 mm
$ 78.83
19.46ct Blue Turquoise, Oval, Opaque
24.8 x 15.9 mm
$ 58.53
24.07ct Blue Turquoise, Oval, Opaque
19.7 x 15.7 mm
$ 71.92
21.31ct Blue Turquoise, Oval, Opaque
22.1 x 13.5 mm
$ 63.68
29.13ct Blue Turquoise, Oval, Opaque
25.4 x 16.9 mm
$ 87.04
54.31ct Blue Turquoise, Oval, Opaque
27 x 20 mm (calibrated)
$ 162.28
21.28ct Green Turquoise, Oval, Opaque
24.6 x 14 mm
$ 38.79
36.87ct Blue Turquoise, Oval, Opaque
27 x 20 mm (calibrated)
$ 110.17
23.46ct Blue Turquoise, Oval, Opaque
22.4 x 20.7 mm
$ 70.10
45.70ct Blue Turquoise, Oval, Opaque
32.6 x 18.5 mm
$ 136.55
21.29ct Blue Turquoise, Oval, Opaque
22.7 x 15.4 mm
$ 64.04
20.88ct Blue Turquoise, Oval, Opaque
20 x 15 mm (calibrated)
$ 62.39
36.79ct Blue Turquoise, Oval, Opaque
27 x 20 mm (calibrated)
$ 109.93
33.66ct Blue Turquoise, Oval, Opaque
26.6 x 18.1 mm
$ 100.58
23.40ct Blue Turquoise, Oval, Opaque
22.9 x 14.8 mm
$ 58.27
21.59ct Blue Turquoise, Oval, Opaque
27.2 x 15.5 mm
$ 64.94
27.38ct Blue Turquoise, Oval, Opaque
27.2 x 17.9 mm
$ 81.81
39.39ct Blue Turquoise, Oval, Opaque
28.1 x 18.2 mm
$ 117.69
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 
Easy and functional
Overall Rating -> 10
overall great
Overall Rating -> 10
GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'
Overall Rating -> 10
All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.
Overall Rating -> 7 
Could not get it to work 25 times.
Overall Rating -> 10
Although the stones are smaller than I thought, I really don't think in millimeters, they are perfect. I plan to put one into a ring and the other into a necklace. Ordering was easy, contact kept me aware of how shipping was going, and delivery was sooner than expected. The quality of stones I have ordered in the past and this recent order is outstanding and stones I will be proud to wear.
