Crystal, which is usually translated as chrono, is actually the same thing in physics and chemistry. Basically, the most important component of crystals is silicon dioxide (Sio2), and silicon is also the most important mineral, occupying more than 65% of the crust. The hardness of crystal is between glass and diamond. The growth environment of crystals is mostly underground and caves, which requires rich underground water sources, and groundwater mostly contains saturated silicon dioxide. At the same time, the pressure is about two to three times that of atmospheric pressure and the temperature is between 550 and 600℃. Given a proper time, the crystal will crystallize into hexagonal columnar crystals according to the natural law of hexagonal crystal system. Usually, in the ideal environment controlled by human beings, that is, when the physical and chemical conditions meet the above conditions, the growth rate of crystals is about 0.8 mm per day. ☆ Welcome to Donghai Natural Museum ☆☆ This is also the standard production speed of many artificial crystal laboratories and factories. The crystal thus cultivated is the so-called "synthetic Shi Ying", which is usually cut into chips and used in electronics, computer and communication industries. Some people call it "breeding Shi Ying". Although they use different words, they actually mean the same thing. Generally, the thickness of industrial intraocular lens is about 3 cm, that is, 30MM, and it takes about 40 days to grow. It generally takes about180 days for jewelry industry to grind a crystal ball with a size above 10 cm (100MM). However, this speed is only possible in the most ideal environment controlled by human beings. In nature, the situation is not so optimistic because of raw materials, water quality, temperature, pressure and other conditions. Are constantly changing, it is difficult to achieve the ideal situation. It usually takes tens of thousands or millions of times to achieve the same growth. This is why "geological age" always takes "million years" as the unit, and it is also the precious place of "crystal stone". When a normal crystal grows, a growth line parallel to the axis of the cylindrical tip can be found. Because of the small growth space in underground and caves, especially in the event of earthquakes or crustal changes, they are even easily squeezed by other minerals, and different "crystal planes" often appear. Also, when crystals are still in liquid state, they are often wrapped by other minerals and marls and grow together, such as rutile (which will become crystals later), volcanic marls (which will become phantom crystals later) and so on. These are all part of nature, please don't treat them as flaws. ?