From Conservapediaquartz, mica, or gypsum. Minerals are most commonly found as components of rocks, which are mixture of minerals, but are often found by themselves in more or less pure form.
The molecules of a mineral usually are arranged in a regular pattern, and may grow in a regular, visible, crystalline structure. When they do, they are often beautiful in appearance.
11 Major Mineral Classes
- Phosphates, Chromates, Arsenates, Vanadates
- Tungstates and Molybdates
- Silicates 
- ↑ Sinkankas, John; Mineralogy for Amateurs, Van Nostrand Reinhold Company, 1964, page 49