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pyrite is an abundant sulfide mineral that despite some similarities can easily be distinguished from actual gold by its crystal form (typically cuboidal) and being much harder whereas gold is soft and malleable
Natural copper is relatively soft and often found in intricate and unique structures
copper has been used by humans as ornamentation
The spectacular display of colors these specimens display can be formed by two different geological processes: the oxidation of pyrite causing ultra-thin layers of iron oxide to form on the surface
Rose Calcite Trilobite pyrite is an abundant sulfide
