50 Best Mining Business ideas & Opportunities for 2020
2020-05-23· 50 Best Mining Related Business ideas & Opportunities for 2020. 1. Quartz Mining: Quartz, also known as glass-sand or silica sand is a type of sand that is commonly used in the glass manufacturing industry. Quartz is used in manufacturing glass bottles, optical instruments, windows, electrical insulation, doors, aircraft parts, and other glass ware.