Carico Lake Turquoise and Chalcedony Sterling Silver Ring, Hopi, Signed by Ramon Albert Dalangyawma. Size 8.5, Measures approx. 2 inches x 1 inch. Carico Lake turquoise is named after the location of its mine on a dried up lake bed in a high, cool area of Lander County, Nevada. Its clear, iridescent, spring green color is due to its zinc content and is highly unique and collectible. Chalcedony is found in Payson, Payson Mining District, Mazatzal Mountains, Gila County, Arizona,