In appearance, basalt can be divided into three types: dense, vesicularsub-vesicular. Vesicular basalt has more pores, smaller specific weightmore changes in color. When basalt lava erupts, the crystal grains of its minerals are finer due to the rapid coolingsolidification as a result, the gas in the lava cannot escape in time, thus leaving groups of oval holes. Secondary minerals such as calcite, aragonite, chalcedony, dolomite, limonitesiderite often slowly fill in the pores to form amygdalagrape-shaped aragonite. The specimens collected by this center are from the vesicular basalt of Shanshui Beach, Magong City.