Gemmology Today Quiz #7

Each question has only one correct answer and is worth 2 points. You will have two attempts to find the correct answer. If you select the correct answer first, you will receive 2 points. If you select the correct answer on your second attempt, you will receive 1 point and if you fail to select the correct answer after both attempts, you will receive a zero score. 

In total there are fifteen multiple choice questions.