It was thought for a while that the unknown might be ilvaite.
2.
Ilvaite crystallizes in the monoclinic system in black prismatic crystals and columnar masses.
3.
Ilvaite is structurally related to lawsonite.
4.
One of the iron-rich minerals, ilvaite, was first identified on the island and takes its name from the Latin word for Elba.
5.
"' Campigliaite "'is a copper and manganese sulfate mineral with a chemical formula of Cu 4 Mn ( SO 4 ) 2 ( OH ) 6 ?H 2 O . The formation of campigliaite is related to the oxidation of sulfide minerals to form sulfate solutions with ilvaite associated with the presence of manganese.
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