Cast Basalt
Cast Basalt is a mineral of exceptionally high abrasion resistance, unlimited resistance to moisture, high compressive strength and resistance to virtually all acids and alkalis and is completely corrosion free. Cast basalt is produced by melting selected natural-broken into sizes of 20-50 mm in shaft furnaces at temperatures around 1300º C followed by casting at which the melted basalt forms uniform, pherolithic crystals, hence producing its typical physical properties in particular its exceptional hardness and wear-resistance. Cast basalt reaches a value of hardness of 8 (min) on the Moh’s hardness scale.