The main chemical component of natural pebbles is silica, followed by a small amount of iron oxide and trace amounts of elements and compounds such as manganese, copper, aluminum and magnesium. They have different pigments, such as red for iron, blue for copper, purple for manganese, yellow translucent for silica colloidal stone, emerald with green minerals, etc.; due to the dissolution of these pigment ions into dioxide The types and contents of silicon hydrothermal fluids are different, so they show a color that varies in shades and shades, making natural cobblestones appear black, white, yellow, red, dark green, and grayish. Due to the reasons of camera equipment and monitors, the aggregates have certain errors, forgive me!