Gypsum How Can You Mine It

A gigantic cave of crystals has been discovered in an old silver mine in spain.It occupies a space of 10.7 m 8 m long by 1.8 m wide by a 1.7 m average high and is located at a depth of 50 m in the pilar de jarava lead mine, in the sierra del aguiln, in the municipality of pulp, coinciding with the sea level, 3 km from the coast.