Which nonmetallic minerals are most likely to be of high market value?

A) platinum

B) silver

C) gemstones

D) gold

C) gemstones

Explanation:

Nonmetallic minerals (known as gemstones) such as diamond, emerald, topaz, ruby, agate, malachite, turquoise, jasper, and so on are of great importance in automobile industry and other industries of the world. Thus, there is increase in demand for them. This makes them to have the highest market value.