Pure quartz is transparent and colorless. Any color can result from impurities. Quartz is often found as small sand particles or in microcrystalline form, but it can also form huge six-sided crystals with pyramidal points. Feldspar - Feldspars are the single most common mineral family in the earth's crust. The feldspar found in central Texas is easily recognized by its pink color.
White feldspar is also common.
Talc - Talc is a form of clay , a mineral which is soft and easily eroded. Clays are most often found in shale, or simply as small particles in soil. The mineral talc can form as soapstone, a very soft, soapy feeling metamorphic rock. Mica - Very thin, glassy, shiny flakes, commonly seen in granite and schist. Mica is often black, but may also be gold or silver colored.