Large Goethite after Pyrite “Iron-Cross” Twin from Gachala, Cundinamarca, Colombia

This is an amazing pyrite iron-cross twin. It has well-defined edges and striations as well as good lustre. An iron-cross pyrite is essentially a penetration twin of two pyritohedral pyrite crystals (two pentagonal dodecahedra). There is no point of attachment or any contact damage to this specimen.