Precious Gems & Minerals
1 / 15On the Mohs hardness scale, what number is assigned to talc, the softest mineral?
About Precious Gems & Minerals
Test your knowledge of precious stones and minerals! This free general knowledge activity is built for older adults who want clear, readable browser-based games without sign-up friction.
General knowledge games mix recall, reasoning, and pattern recognition to keep each round varied and mentally engaging. This quiz includes 15 questions, so it works well as a quick session or as part of a longer brain-training routine. A printable version is available if you prefer offline play or want to share the game at home, in a classroom, or in a group setting.
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