Formula: MgSO4.4H2O
Origin of name: after locality Starkey mine, Madison County, Missouri, USA
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: white
Diaphaneity:
Luster: dull
Habit: massive, powdery efflorescence
Hardness:
Specific gravity: 2.01
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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