Formula: (Mn,Fe)SiO3.H2O
Origin of name: from Greek for new born
Crystal system: unknown
Crystal class: unknown
Twinning:
Unit cell:
Colour: black, dark brown
Diaphaneity: nearly opaque
Luster: resinous
Habit: massive, compact
Hardness: 3 to 4
Specific gravity: 2.43
Cleavage: none
Tenacity:
Streak: dark brown to black
Synonyms/varieties:
Comments:
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