The most prevalent and plentiful mineral in nature is Quartz Mineral. It is present in practically all geological settings and makes up at least a portion of almost all rock types. It is formed of trigonal crystalline silica and has a hexagonal crystal structure. In terms of variety, colors, and forms, it is the most diversified. The key difference between the two types of quartz is that one is macrocrystalline, meaning that each crystal can be seen individually with the unaided eye.