Table saltThe white or grey stuff you add to your food is a purified form of the mineral halite, pro
Table saltThe white or grey stuff you add to your food is a purified form of the mineral halite, produced by evaporating sea water or mined from the remnants of evaporated seas such as the Permian Zechstein that lies under the surface rocks of much of Europe. Sometimes though a lovely gemmy piece worthy of a mineral collection turns up, such as this bright blue crystal from the Intrepid potash mine in New Mexico. the specimen measures 8x4x2cm.LozImage credit: Joe Budd/Rob Lavinsky/iRocks.com -- source link
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