I can be valuable or common, and I often glimmer in the light. I can change shape but not essence. What am I?

Category: Science · Difficulty: easy

Hint: Think about what forms in the earth.

Answer

A mineral's crystal

Explanation

Minerals form crystals that can take various shapes and can be either common or precious.

This is an easy science riddle — a good one for children and beginners. The answer is A mineral's crystal.

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