Directly Available www.universalchemical.org This product is used for crushing and processing precious metals and semiprecious stones. It is used for processing precious and semiprecious stones, crushing metals in the chemical industry. This facilitates to break nails with bare hands after a 10-20 second dive. Heavy water changes the properties of the metal, making it brittle. But at the moment of evaporation of heavy water, the rock returns to its previous state Show More