crystal

      Crystal is a colorless transparent quartz crystal mineral. Its main chemical is silica, with ordinary sand is "with the mother of a" kind of material.

When the silica crystal is perfect crystal; silica gel dehydration is agate; silica water colloid after solidification to become opal; silica grains less than a few microns, the composition of chalcedony, flint, secondary Stone object.

      Crystalline crystal crystal crystal is a hexagonal system, often hexagonal prism, the column for a sharp or two sharp, a number of long columns connected in a piece, known as the crystal family, beautiful and spectacular. Silica crystals are not complete, the shape can be described as different poses and attitudes. When you go to the Hainan Crystal Museum to see a look, you can eye-opener: In addition to the common long column, there are like sword-shaped, and some if the plate, and some like a short column, and some like a double cone. Some small as a finger, and some large as boulders; some less than half, some weighing more than 300 kilograms