Sensationelle Matrixstufe
I don't think I've ever seen as rich a blue in a zoisite as this 10 cm specimen on matrix from the Merelani hills of Tanzania
Formula: Ca2Al3(Si2O7)(SiO4)O(OH)
System: Orthorhombic
Colour: purple, ...
Lustre: Vitreous
Hardness: 6 – 7
Photo : © Malte Sickinger
