Nearly all rock deposits contain some metallic minerals, but in many cases the concentration of metal is too low to justify mining the ore. Some ores are simple chemical compounds, while others are chemically complex minerals. Important ores of aluminum, iron, manganese, and tin are oxides; important ores of antimony, copper, lead, mercury, nickel, silver, and zinc are sulphides. Some metals, called native metals, occur uncombined in nature, e.g., copper, gold, platinum, and silver.
We buy Silver ore from all around the world.