Stone(s): 1 genuine Nevada turquoise (20.5 carats) and 1 genuine blue topaz (0.1 carats)
Overall Dimension (including bail): 1.75 x 0.55 x 0.4 inches
Inner Bail Diameter: 6 mm
Weight: 6.8 grams
Stamp/Mark: Starborn, 925
Serial Number: p32308
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.