Quartz is an abundant mineral. Most sand is made up of small pieces of quartz. Quartz is important in glass making and in electronics. It is also used for sanding hard surfaces. It is used as a building stone.
Slate is a metamorphic rock formed from shale under great pressure.
It is used for chalkboards and as a building stone. Talc is commonly used in talcum powder. This page was developed by Mrs. Kim Brannon Please email any suggestions or comments.