Formula: K(Mg,Fe)(Fe,Al)Si4O10(OH)2
Origin of name: From French celadon = sea green
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 5.22 Ǻ, b = 9.05 Ǻ, c = 10.20 Ǻ, β = 100.4°
Colour: Green, blue-green
Diaphaneity:
Luster: Dull
Habit: Micaceous scales, minute; earthy
Hardness: ~ 2
Specific gravity: 2.95 to 3.05
Cleavage: 1; {001} perfect
Tenacity:
Streak:
Synonyms/varieties: Veronite
Comments:
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