Quartz

My mom asked me to write about another mineral today. This time I chose quartz. Quartz is the second most common mineral on earth. It is made out of silicon–oxygen tetrahedra or Sio4. There are quite alot of kinds of quarts.  Some of these are:  amethyst, citrine, Prasiolite and, many others. Some of theme are precious gemstones.
In the middle east quartz is the most commonly used material in the making of jewelry.  It usually comes in very large sizes. Also as most of it knows it is used to make glass. Sorry but that little amount was all I could find.