Gemstones trivia

Related Trivia

Diamonds, rubies, Mohs hardness scale, mineral crystals, and precious stones.

Test your knowledge with these top questions!

Question 1

Which mineral tops the Mohs hardness scale at 10?

Mohs measures scratch resistance rather than absolute hardness, and only a diamond can scratch another diamond.

Question 2

Ruby belongs to which mineral family?

Ruby and sapphire are both corundum; chromium impurities color the crystal red.

Question 3

Emerald is the green variety of which mineral?

Pure beryl is colorless; chromium or vanadium turns it green as emerald.

Question 4

Which element gives rubies their red color?

Chromium replaces some aluminum atoms in corundum, shifting the crystal from clear to vivid red.