Multiple choice general knowledge

Which of the following is an element?

  1. Ruby

  2. Sapphire

  3. Emerald

  4. Diamond

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Diamond is an element because it consists of only one type of atom - carbon atoms arranged in a specific crystal structure. Ruby, Sapphire, and Emerald are all minerals composed of multiple elements (corundum with chromium/traces for Ruby, corundum with iron/titanium for Sapphire, and beryl with chromium for Emerald).