What is a Mineral?. A mineral is a: Naturally occurring, Inorganic, Crystalline solid, That has a definite chemical composition. Some Minerals. What is a Rock?. A rock is a: Naturally formed, Consolidated material, Composed of grains of one or more minerals. Some Rocks.
All minerals are crystalline, ,made of atoms arranged in a pattern.
Crystals are minerals with geometric shapes and smooth flat surfaces called faces.
Each kind of mineral has its own crystal shape and will develop into this form if it has room to grow w/o restrictions.
Magnetite (Lodestone) and Pyrite (Fool’s Gold)