Everyone usually chooses to buy some crystal ornaments and crafts to decorate the interior. If you are not careful, it is easy to buy artificial crystals pretending to be natural crystals. The chemical composition (silica, SiO2) and internal structure of artificial crystals are the same as natural crystals, and they are all crystals. Under the polarizer, when you rotate it 360 degrees, you can see four bright and four dark changes. The chemical composition of optical glass is mainly silica, and there are other components. Most importantly, optical glass is not a crystal. When rotated under the polarizer, it is completely dark (that is, the four light and four dark are unchanged). Artificial crystals, from the point of view of crystal structure and chemical composition, are a kind of crystals belonging to the triangular crystal system. According to its chemical composition, glass can be further divided into the following types: 1. Crown glass: chemical composition --- SiO2 74%; sodium oxide 14%; calcium oxide 12%. 2. Flint glass: 54%; lead oxide 37%; potassium oxide 3%. 3. Borosilicate glass: 72%; boron trioxide 12%; sodium oxide 10%; aluminum oxide and 5%. 4. Quartz glass: 100%. This is a glass made by melting pure silica into a liquid and then slowly cooling it down. Although its composition is the same as the artificial crystal, it is still glass and contains many bubbles (there are no bubbles in the artificial crystal).

◆Artificial crystals andNatural crystalThe chemical components are all silica, and high-purity silica is called "crystal". Natural crystals are transparent quartz crystals in the form of hexagonal columnar crystals. It has high hardness and strong reflective beacon.

◆Pure crystals are colorless and transparent crystals, natural crystals with almost no impurities. Most natural crystals contain bubbles, impurities, and crystals are mixed together.

◆Artificial crystals are made of quartz sand materials through a series of processes, fine cutting techniques and flawless polishing. The crystal is pure and transparent, which makes up for the shortcomings of natural crystals.

◆Adding metal elements such as lead to artificial crystals can enhance the decomposition of light and show the nobility of the crystals. Due to the complex craftsmanship and exquisite craftsmanship of intraocular lenses, some crystals are even more expensive than natural crystals.

◆Ultraviolet rays can pass through artificial crystals and natural crystals, but ordinary glass cannot.