Question

What is a gemstone?

a. a mineral that is rare and is considered to be beautiful
b. a rock or mineral that is used to make jewelry
c. a rock or mineral that is valuable
d. all of the above

Answer 1

I think it's all of the above

Answer 2

Answer: d. all of the above.

Explanation:

I used my common sense about how gemstones work. Also, it fits all of the descriptions.