Photos of Natural Silver Ore, Silver minerals, Crystal ores, rich Silver .Gold and silver are obtained from a variety of ores, in some of which the gold . in others silver is the primary value, while in still a third class these two metals may be .. a common manganese mineral that is found in a number of silver ores.identifying gold and silver ore 2 manganese,Chemical tests for the metal content of various oresField tests for metals in ore rocks. . Gold: A test known as Darton's is believed to be a valuable means of . it must be boiled for at least two hours in the mixture of muriatic and nitric acid, known as aqua regia. . Manganese: Manganese may be proved as follows: A few grains of . Identifying Ores of Silver, Copper and Lead.
identifying gold and silver ore 2 manganese