This is an excellent pseudomorph of actinolite after diopside. Usually referred to as uralite, Calumet material is some of the nicest around. Seen here in radiating crystals to 6 cm.
This is an excellent pseudomorph of actinolite after diopside. Usually referred to as uralite, Calumet material is some of the nicest around. Seen here in radiating crystals to 6 cm.