A mineral is a naturally occurring substance that is solid and stable at room temperature, representable by a chemical formula, usually abiogenic, and has an ordered atomic structure. This Collection contains 30 Types of Basic Minerals Specimens. The Minerals Specimens include Some of the following Alabaster, Beryl, Biotite, Boron, Calcite, China Clay, Dolomite, Feldspar, Fire Clay, Fullers Earth, Graphite, Gypsum, Kaoline, Lignite, Pumice, Magnetite, Mica, Ochre Yellow, Pyrolusite, Quartz, Silica Sand, Silliminite, Soap Stone, Steatite & Sulphur etc.