I am taken from a mine, and once used, I am easily lost. What am I?
Category: Knowledge · Difficulty: hard
Hint: Think about something that writes.
Answer
Graphite
Explanation
Pencil lead is made from graphite, which is mined, and it can easily break or get lost.
This is a hard knowledge riddle — a tricky one that takes a little thought. The answer is Graphite.
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