Iron Cross Pyrite Twin – Gachalá, Cundinamarca, Colombia
 
Rare pyrite floater crystal showing the classic twinning, which is known as the Iron Cross.The pyrite crystal has a thin brilliant metallic luster of goethite on the surface and sharp complex faces!!!The pyrite iron cross twins from Colombia are exceptionally large and unique."Iron Cross" are twin crystals that have the shape of two pentagonal dodecahedrons (also called pyritohedrons). These twins have edges that intersect at 90 degrees, creating a cross.The Iron Cross law is well known and shown in specimens from various localities, but complete crystals of good size are rarely found. This remarkable piece originates from a find from 2018.Superb Iron Cross.