Overall Dimension (including bail): 3.25 x 2.0 x 0.2 inches
Inner Bail Diameter: 11 mm
Weight: 39.8 grams
Stamp/Mark: OBSIDIAN STERLING
Serial Number: p30966
Beautiful turquoise is a phosphate mineral popular all over the world. Mined since 5000 BC, it is one of the first gemstones known to be used by humans. Color variation from sky-blue to medium green is affected by differing amounts of copper and iron, more copper giving the stone a bluer color and more iron a greener one. Beautiful light blue turquoise is mined in Northern Iran and other varieties occur in Mexico, the United States and elsewhere.