I can be soft enough to sculpt yet hard enough to build. Found in many colors, I am a product of ancient seas. What am I?
Category: Knowledge · Difficulty: expert
Hint: Think of a sedimentary rock that can be formed from shells.
Answer
Limestone
Explanation
Limestone is composed mainly of calcium carbonate from marine organisms and can be soft or hard.
This is a expert knowledge riddle — one of the harder riddles here. The answer is Limestone.
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