All minerals are found under our feet. There are four main types of minerals. This is all about nonmetallic and metallic minerals. Obviously, nonmetallic minerals do not have metallic substances, while, metallic minerals have metallic substances. All minerals are very interesting, but nonmetallic and metallic might be more familiar to you. Finding minerals can be fun, but, also, they can be very valuable to you, as a collector, or worth some money. This site will give you an idea on what some minerals look like and a little about their history.