Crystal

Crystal stone crystal stone is an alias, also known as crystal, and its English name is Rockcrystal, and its alias is spar and crystal stone. Crystal is a colorless and transparent Shi Ying crystal mineral. Its main chemistry is silicon dioxide, which is a kind of substance that "comes out of the womb" with ordinary sand. When the silicon dioxide crystal is perfect, it is crystal; Silica is agate after gelatinization and dehydration; Silica gel containing water becomes opal after solidification; When the grain size of silica is less than several microns, chalcedony, flint and secondary quartzite are formed. The crystal with perfect crystallization belongs to the hexagonal system, often in the shape of a hexagonal prism. The cylinder is pointed at one end or at two ends, and many long cylinders are connected together, which is commonly called crystal family, which is beautiful and spectacular. The crystal of silicon dioxide is incomplete, and its shape can be described as various. When you go to Hainan Crystal Exhibition Hall, you can open your eyes: in addition to the common long columns, there are sword-like shapes, some plate-like, some short columns, and some double cones. Some are as small as fingers, and some are as big as boulders; Some are less than half a second, and some weigh more than 300 kilograms.
Reprinted with attribution： https://cnlocality.com/(Chinese Specialty Products)