Category: Building Stones

According to the geological classification, rocks are subdivided into three large groups, viz., igneous rocks, sedimentary rocks and metamorphic rocks.

The origin and conditions of rock formation predetermine their chemical and mineralogical composition, crystalline structure and texture. These characteristics, underlying the strength and decorative properties of rocks, are the starting point for the engineering and economic evaluation of rocks for various structures of buildings and installations. The three major classifications are based on the following…

The earth’s crust is composed of rocks. Rock is a mineral mass of a more or less uniform composition. It may consist of a single mineral (monomineralic) or of several minerals (polymineralic). A mineral is a natural body, homogeneous in chemical composition and physical properties. Further minerals are the products of physical and chemical processes…