This is 100% Natural, Untreated material.
 Natural Carico Lake Turquoise Cab from an Old Navajo Jewelers Collection. YES this is Authentic Old Carico Lake Turquoise.

*We see a LOT of Sellers claiming "green" stones as Carico Lake. Uhh No. Carico Lake turquoise has a specific Spiderwebbed matrix, and it DOES come in a rainbow hue of Blues, Sage Greens, Mid Greens (with black chert), and the famous bright green material with faustite nodules. (which can fetch over $30 a carat)! Know your stuff. Do your research. Carefully buy from reputable dealers. There is gobs and gobs of green turquoise which is NOT Carico Lake. In fact, our Sonoran Gold Turquoise comes in at a stunning close second, but we clarify in the title that it is NOT Carico Lake. An experienced eye can easily tell between the two.
This material is from the High and Dry CARICO LAKE Turquoise Mine in Lander County, Nevada.  Really nice Blue/Green Carico cabs with amber Spiderweb matrix.  A Perfect size for a Bracelet or a Large ring!

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Specifics & Measurements-