Types of Rocks

Quartz: Quartz is one of the most abundant minerals in Earth's crust, second only to feldspar. It falls under the category if a silicate mineral.

Granite: Granite is an igneous rock consisting of quartz, mica, and feldspar. Granite is the result of crystallization of magma from below Earth's surface.

Kaolin: Kaolin is a clay-like sedimentary rock. It is sometimes eaten in rural parts of the US to obtain nutritional value

Gneiss: Gneiss is a metamorphic rock resulting from the transformation of other sedimentary rocks. One of its uses is to line sewer drains to stop erosion.