There are many unit cells in the crystal. Due to the irregular structure of Du, after light is transmitted, some inner facets are totally reflected (specular reflection) and some inner facets are diffusely reflected, so from the outside, it will have different effects.

When containing trace elements such as aluminum and iron, it is pink, 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. Minerals containing associated inclusions are called inclusion crystals, such as hair crystal, green ghost, red rabbit hair and so on. Inclusions include rutile, tourmaline, actinolite, mica and chlorite.

Extended data

There are more than ten kinds of names of ancient crystals in China, such as water mirror, aquamarine, aquamarine and crystal. Therefore, in order to facilitate the distinction, Rockcrystal is usually referred to as (rock crystal) in the world. The well-developed single crystal is a hexagonal cone, so it is usually a block or granular aggregate, which is generally colorless, gray and milky white. When it contains other mineral elements, it is purplish red, smoky red, brown and so on.

When the silicon dioxide crystal is perfect, it is a crystal; Incomplete crystallization is the appropriate time: silica becomes agate after gelatinization and dehydration; Water-containing silica gel becomes opal after solidification; When the particle size of silica is less than several microns, chalcedony, flint and secondary quartzite are formed.

Chemical composition: silica, containing 46.7% silicon and 53.3% oxygen. Because it contains different trace elements or color centers, it presents a variety of colors.

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