Monohydrocalcite

Formula:  CaCO3 . H2O

Origin of name:  From Greek mono - one and hydro - water and from calcite

 

Crystal system:  Hexagonal

Crystal class:  3

Twinning: 

Unit cell: a = 10.566, c = 7.573

 

Colour:  White to gray, light green

Diaphaneity: 

Luster: Earthy, dull

Habit:  Massive, fine-grained, cryptocrystalline

Hardness

Specific gravity:  2.38

Cleavage:  None

Tenacity: 

Streak: White

 

Synonyms/varieties:

 

Comments:  Fluorescent

 

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