Annabergite
Chemical Formula	Ni3(AsO4)2·8H2O
Species	Phosphates
Crystal System	Monoclinic
Mohs Scale	1-2
Specific Gravity	3.07
Color	Apple-green, pale green, pale rose or pale pink, white, gray; may be zoned
Streak	Pale green to white
Luster	Sub-Adamantine, Sub-Vitreous, Pearly, Earthy
Refractive Index	n = 1.622 n = 1.658 n = 1.687
Diaphaneity	Transparent, Translucent
Cleavage	PerfectPerfect on , indistinct on , .
Crystal Habit：Usually as fibrous veinlets, crystalline crusts, or earthy; rare as well formed crystals
Geological Setting：An uncommon oxidation zone mineral in Ni-Co-As deposits, frequently post-mine on ores exposed to the atmosphere.