Formula: Ca(Zn,Mn,Fe,Mg)Si2O6
Origin of name: for Pete Dunn, American mineralogist
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: dark green
Diaphaneity: translucent
Luster: vitreous
Habit: mosaic of 10 to 100 micron grains in groups forming large "single crystals"
Hardness:
Specific gravity: 3.68
Cleavage: 1; perfect, probably {110}
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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