which choice names two ways nonmetallic minerals can be used , A wiring and gems , B gems and as conductor ,C industrial processes and gems ,D conductors and for industrial purposes
Non - metallic minerals can be used for industrial processes and as gems. Some non - metallic minerals have great value, good cut and attract a good market price. Example is ruby and tourmaline.
Most non -metallic minerals are used for industrial process especially as raw materials.
These materials are poor conductors and cannot be used as one.
They cannon be used for wiring because they lack metallic bonds within their lattices.
So, the best used is for industrial processes, for the valuable ones, they are of good gem grade.
