Question 1: Which is the hardest gemstone on the Mohs scale?
Citrine
Diamond
Opal
Correct Answer: Diamond
Question 2: Which ranks higher on the Mohs scale: a Herkimer diamond or a ruby?
They’re the same hardness
Herkimer diamond
Ruby
Correct Answer: Ruby
Question 3: What would a jeweler use the Mohs scale for?
To see if a gemstone fades in sunlight
To see how durable a gem is for daily wear
To see a gemstone’s weight
Correct Answer: To see how durable a gem is for daily wear