Which of the Following Is Not a True Statement

Multiple Choice

Which of the following is not a true statement?

A) Gem stones are classified primarily for their rarity and/or beauty
B) Industrial-grade diamonds are beneficial for mining in the Earth's crust because they are very hard minerals
C) Depending on its monetary value, a gem will be classified as either precious or semiprecious
D) If you purchased a semiprecious gem known as garnet, it would not be worth as much money as a precious gem such as an emerald
E) Precious gem stones include diamonds, emerald, ruby, and sapphire
F) All of the above are true statements