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the principal mineral extracted is ammonite gemstone, calcium chloride, diamond, gypsum, halite, kaolin, lithium or sylvite, or
the principal mineral extracted is ammonite gemstone, calcium chloride, diamond, gypsum, halite, kaolin, lithium or sylvite, or
the principal mineral extracted is ammonite gemstone, calcium chloride, diamond, gypsum, halite, kaolin or sylvite, or
the principal mineral extracted is ammonite gemstone, calcium chloride, diamond, gypsum, halite, kaolin or sylvite, or