Rock and mineral content

Definitions of Rock A rock is any solid substance that forms part of the earth’s crust. Rock is made up of minerals. The most common rocks and their minerals are: Rocks                                                    Mineral content Limestone                                           Quartz, micas, feldspar Sandstone                                          Quartz, Calcite, feldspar Granite                                                Feldspar, augite Basalt                                                   Calcite, dolomite Shale                                                    Quartz, micas, feldspar