Peruvian Chrysocolla 10mm Round - 15-16 Inch 10x17mm and forms within a host

and forms within a host rock such as ironstone or sandstone

It's also porous so it absorbs stains

second only to Quartz

Quartz is the most common mineral found on the face of the earth and occurs in all environments and all rock types - sedimentary

Peruvian Chrysocolla 10mm Round - 15-16 Inch 10x17mm 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.