Minerals

https://msms4.com/ZvsG3RNFThere are roughly 4000 named minerals in the world , Minerals are substances that are formed naturally in the Earth. Minerals are usually solid, inorganic, have a crystal structure, and form naturally by geological processes. There are over 4,000 types of known minerals.

Some of the most common minerals in the earth include quartz, mica, olivine, feldspar, amphibole and pyroxene. Quartz is made of silicon dioxide, a mineral most often identified as grains of sand on a beach or in a desert. Feldspar comes in many different varieties, as this mineral describes seven major blends of elements. Roughly 60 percent of the earth's crust is composed of feldspar. Mica peels into flat layers and comes in shades ranging from white to dark brown.

Other common minerals include talc,
pyrite (fool's gold), calcite, clay and magnetite. A mineral is defined as a naturally occurring, inorganically formed, homogeneous solid that has been formed by geological processes and has a well defined chemical composition in addition to an ordered atomic structure

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