Clinohedrite

Formula:  CaZnSiO₄ ^. H₂O

Origin of name:  From Greek klinen = to incline and hedra = base

Crystal system:  Monoclinic

Crystal class:  m

Twinning:

Unit cell: a = 5.43 Ǻ, b = 15.94 Ǻ, c = 5.24 Ǻ, β = 103.9°

Colour:  Colourless to white, amethystine, pinkish or purplish

Diaphaneity:

Luster:  Vitreous, pearly on cleavage

Habit:  Crystals prismatic, tabular or wedge-shaped; massive, granular, lamellar

Hardness:  5.5

Specific gravity:  3.28 to 3.34

Cleavage:  1; {010} perfect

Tenacity:  Brittle

Streak:

Synonyms/varieties:

Comments:  Fluoresces orange under SW