Hemimorphite
Chemical Formula
Zn4Si2O7(OH)2H2O
Chemical Class
Native Elements
Properties
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.
Origin
Vazante, MG.
Curiosities
Named in 1853 by Adolph Kenngott, due to the crystal hemimorphic morphology, both ends have contrary symmetries.
Use
It is a secondary zinc ore and collectors´ piece.
Source: MM Gerdau - Museu das Minas e do Metal -