Mina Emilio hyaline quartz crystals are well known to collectors. Complex forms, with more developed facets, especially rhombohedral and with defined edges. Some doubly terminated, all of them brilliant and transparent. They usually present interesting inclusions of hydrocarbons or/and sulphides. They are accompanied by scalenehedral crystals of calcite that give an aesthetic touch to the pieces. The main crystal is: 3,5 x 2,4 x 2,3 cm.