With 4.5 to 5 hardness, it can be colorless, white, pale yellow, sky blue and brown. Transparent to translucent, hemimorphite can present adamantine, vitreous and pearlescent glosses.
Named in 1853 by Adolph Kenngott, due to the crystal hemimorphic morphology, both ends have contrary symmetries.
It is a secondary zinc ore and collectors´ piece.
Source: MM Gerdau - Museu das Minas e do Metal -