The Raymond mill is used to grind materials in the fields of building materials, mining, metallurgy and chemical industry. The materials must be nonflammable and nonexplosive materials such as: limestone, calcite, barite, dolomite, potassium feldspar, marble, talcum, gypsum, kaoline, medical stone, rock phosphate, manganese ore, .
The Vedas describe a connection between eternal life and gold. The use of Mercury for alchemy is first documented in the 3rd or 4thcentury Arthashastra. Buddhist texts from the 2nd to 5th centuries mention the transmutation of base metals to gold. Greek alchemy may have been introduced to Ancient India through the invasions of .