From: Mina da Panasqueira, Covilhã, Castelo Branco, Portugal.
  
Green grey translucent hexagonal prims with small twinnings with 5,2 x 3,6 x 2,0cm  and 47 grams. Formed in mineralized veins of quartz, sulfides, wolframite, cassiterite, micas, fluorite, carbonates, among others, associated with the generation of a greisen dome by granitic intrusion in Paleozoic shales and graywackes.