Blue Scorodite Crystals
Blue Scorodite Crystals. Photo credit:

Formula:  FeAsO₄·2H₂O
Colour:Green, blue-green, grey, ...
Lustre: Sub-Adamantine, Vitreous, Resinous
Hardness:3½ - 4
Scorodite is a common hydrated iron arsenate mineral, with the chemical formula FeAsO₄·2H₂O. It is found in hydrothermal deposits and as a secondary mineral in gossans worldwide.

Scorodite was discovered in the Schwarzenberg, Saxony district, Erzgebirge, Saxony, Germany. Named from the Greek Scorodion, "garlicky". When heated it smells of garlic, which gives it the name.

From Clara Mine, Oberwolfach, Freiburg Region, Baden-Württemberg, Germany
Ex. Wolfgang Pohl coll.