Cabinet specimen loaded with good size 1.5cm Arsenopyrite crystals. The flip side is a completely different presentation with Siderite covering melted looking Galena. Excellent specimen from this important mining district.
Arsenopyrite
Formula
FeAsS
Crystal System
Monoclinic
Crystal Habit
Striated, Euhedral Crystals, Prismatic
Cleavage
one distinct
Luster
Metallic
Color
tin white, light steel gray
Streak
black
Geological Setting
Widespread. Most commonly found in medium to high temperature veins.