Chrysocolla, a hydrous copper silicate, is often mistaken for turquoise due to its rich blues and blue-greens. It often also occurs with colors of rust, copper, black, white and reddish brown in speckles, veins and brecciated patterns. It is a very soft stone typically found near copper deposits. Chrysocolla was first described by Theosphrastus, a Greek philosopher and botanist who also named the stone, in 315 BCE. Yep, over 2,000 years ago. Mohs hardness 2-4.
3mm Approx. 135 on approx. 16 inch (40.64 cm) strand. (strand)