2, strawberry crystal (rock crystal), rare minerals, a gemstone, quartz crystals, in mineralogy belongs to the quartz family, the main chemical component is silicon dioxide, chemical formula for SiO2, pure when the formation of colorless transparent crystals, when containing trace elements Al, Fe, etc. was purple, yellow, teal, etc., irradiated trace elements to form different types of color heart, resulting in different colors such as purple, yellow, teal, pink, etc.. Produce different colors, such as purple, yellow, teal, pink and so on.

3, with accompanying inclusions of minerals called inclusions crystal, such as hair crystals, green ghosts, etc., within the inclusions for rutile, tourmaline, actinolite, mica, chlorite, etc..