1. Crystal is a kind of gem. The chronotropic crystals belong to the chronotropic family in mineralogy. Its main chemical compos
1. Crystal is a kind of gem. The chronotropic crystals belong to the chronotropic family in mineralogy. Its main chemical composition is silicon dioxide, and its chemical formula is SiO2.
2. When it is pure, it forms colorless and transparent crystals. When it contains trace elements such as aluminum and iron, it is purple, yellow and brown. After irradiation, trace elements form different types of color centers and produce different colors, such as purple, yellow, brown and pink. Inclusion crystals containing associated inclusion minerals, such as frosted crystals and green ghosts, include rutile, tourmaline, actinolite, mica and chlorite.
3. Western countries think that everything that is transparent is crystal, so the word crystal includes colorless transparent glass (K9, ordinary glass is blue) and rock crystal ore. The ancient crystal names in China include water mirror, aquamarine, aquamarine, crystal, etc., which were purified at the "Hehan Sancai Conference". Therefore, in order to facilitate the distinction, Rockcrystal is usually referred to as (rock crystal) in the world.