Copper Oxide is the black nonfinalize design powder or crystallize, pellet (monophase powder) with density 6.313, melting point 1446℃, melting rate11.80KJ/mol, hardness 3.4, dielectric constant 18.10. It doesnt dissolve in water, but dissolves is in acid, ammononia water, ammonium chloride, then turns into blue solution. It can be also turned back to copper powder with hydrogen or carbon monoxide in high temperature.