Formula: Ca6(Mn,Mg)Be4(SiO4)2(Si2O7)2(OH)2
Origin of name: After locality; Harstigen mine, near Pajsberg, Sweden
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Colourless
Diaphaneity: Transparent
Luster: Vitreous
Habit: Crystals stout prismatic, small
Hardness: 5.5
Specific gravity: 3.16
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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