Silicon is used in a lot of electronic equipment. The good thing about this is silicon is a very common element. In fact it is the eight most common element in the universe according to scientists.
Silicon is found mixed with other elements and needs to be refined if you want pure silicon. Most uses for silicon don't call for a pure form, so it isn't purified most of the time.
Silicon has a multitude of uses commercially. It is the basis of most building materials like brick, stucco, cement and mortar. It can also be used in more delicate items like ceramics and different glass products.