Home > Mexico III Ojuela I – January 12 > MS1718 Aragonite with Malachite

Aragonite with Malachite - Sold

Aragonite is calcium carbonate, polymorphous with calcite. The mineral name recalls its discovery in Aragon, Spain (Haüy, 1791). Malachite is also a carbonate, containing copper and water. The name malachite comes from the Greek word malache for mallows.

This specimen is a curious assemblage of calcite microcrystals, some enclosing malachite on which copper apparently formed. The copper is replaced by cuprite and coated with fibrous malachite. Also preset are white aragnonite crystals, up to 8 mm long. This writer has not seen another such specimen from Ojuela.