Silver ore Silver has been used as an ornamental and coinage metal since ancient times.There are abundant and various mineral resources all over the world, but silver ore mineral is very poor in the mass. Silver is a silver-white, lustrous, precious metal with high heat and electricity conductivity. Silver is often found combined with other ...

Gold ore Gold was one of the first metals to attract human’s attention due to its natural occurrence as a yellow, lustrous metal with tarnish durability. Gold is a precious metal with unique properties of malleable and ductile of all the metals and one of the softest and heaviest. It is an excellent conductor of ...