Chrysocolla 3mm Round Bead 15-16 Inch Size_6x9-8x13mm and forms within a host

and forms within a host rock such as ironstone or sandstone

they appear dark or black

The inner layer of the shell is composed of nacre (mother-of-pearl)

dainty necklace

milky whites

Chrysocolla 3mm Round Bead 15-16 Inch Size_6x9-8x13mm and forms within a hostChrysocolla, a hydrous copper silicate, is often mistaken for turquoise due to its rich blues and blue to 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.