Minerals are very useful to us. Which of the following is a false statement?

A. Pyrite is an ore of gold and is used in jewelry making.

B. Cobalt is not used in medicine.

C. Quartz is used to make glass.

D. Quartz is used to make glass.

A. Pyrite is an ore of gold and is used in jewelry making.

Explanation:

Pyrite is a combination of iron and sulfur, chemically knwon as iron sulfide, it's called the fool's gold because it has a golden colour and it's metallic state often can be preceived as gold, but it is not used in jewelry because could be poisonous to the people wearing it, it's main use is production of sulfur or sulfiric acid.

A. Pyrite is an ore of gold and is used to jewelry making is a false statement