Mineral and Gemstone quiz

Ini adalah kuis tentang mineral dan batu permata, membantu Anda menjadi akrab dengan mereka.

This quiz will help you become familiar with a few minerals and gemstones. There is questions about birthstones, mohs scale, mineral colors, and their structure. The time limit per question is 10-15 seconds and it will tell you the correct answer once you get it wrong twice or run out of time