Clinohedrite

Formula: CaZn(SiO4).H2O
Nesosilicate (insular SiO4 groups)
Specific gravity: 3.33
Hardness: 5½
Streak: White
Colour: Colourless to white, pale amethystine
Solubility: Gelatinised in hydrochloric acid
Environments:

Metamorphic environments
Hydrothermal environments

At the type locality, Trotter mine, Franklin, New Jersey, USA, clinohedrite occurs in a hydrothermally altered, metamorphosed zinc-manganese-iron silicate-oxide orebody, with willemite, axinite, hancockite, roeblingite, hardystonite, esperite, datolite, bustamite, andradite, nasonite, glaucochroite, calcite, larsenite, hodgkinsonite and franklinite.

At the Christmas mine, Arizona, USA, clinohedrite occurs with stringhamite, kinoite and apophyllite.

Common impurities: Fe,Al,Mn,Mg