For statistics and information on the use of minerals, and the supply and demand for minerals essential to the US economy, visit the USGS Minerals Page For information about the chemical formula of a mineral and a picture of the mineral, go to this page . For descriptions of physical properties of minerals, visit Amethyst Galleries' Mineral Gallery .
Amethyst has one of the oldest and best mineral web sites.
If you want to see pictures of beautiful gemstones, visit the Smithsonian Institution's mineral site .