Of these, only atacamite and boleite are common enough to be seen at rock shows and in rock shops with regularity. Color is sky blue to dark blue. Luster is adamantine. Crystals are usually translucent to transparent. Cleavage is perfect.
Fracture is conchoidal.
Streak is blue. Associated Minerals include other copper and lead minerals such as boleite , linarite , anglesite , wulfenite , phosgenite and cerussite . Notable Occurrences are limited to the Mammoth-St. Anthony and Rowley Mines of Arizona , USA and the type locality of Higher Pitts Mine, Mendip Hills, Somerset, England. Best Field Indicators are color, density, fracture, streak and locality.