Formula: Mg5(CO3)4(OH)2 . 5H2O
Origin of name: For Giorgios, volcanic cone, Santorini, Greece
Crystal system: Unknown
Crystal class: Unknown
Twinning:
Unit cell:
Colour: White
Diaphaneity:
Luster:
Habit: Spherulitic growths, crusts
Hardness:
Specific gravity: 2.15
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments: Species status uncertain, may be the same as hydromagnesite
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