Euclase
Introduction: Euclase is found in granite pegmatites. It is named from the Greek eu meaning 'well' and klas meaning 'break', a reference to the minerals well-developed cleavage.
Distribution: Occurs in the Klein Spitzkoppe pegmatites.
Composition: Silicate
Crystal system: Monoclinic
Lustre: Vitreous
Streak: White
Hardness: 7.5
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