Chemical Formula:  Zn4Si2O7(OH)2 - H2O

Chemical Name: Hydrated Zinc Silicate Hydroxide

Mineral Class: Sorosilicate

Mineral Notes:  Hemimorphite is one of the most common Sorosilicates. It is a fascinating mineral because its crystals are polar. What this means is that the crystal structure produces a different termination at each end, hence hemimorphic crystals from where it gets its name. One termination, the "bottom" is blunt being dominated by a pedion face while the "top" end is terminated by the point of a pyramid.