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Si tratta di un quiz su minerali e pietre preziose, che ti aiuta a essere a conoscenza.
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 timeNovità nell'ultima versione 2.0
Last updated on Apr 10, 2016
New questions
Some updated graphics
And new description on the main menu!
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Mineral and Gemstone quiz
2.0 by Our Exotics
Apr 10, 2016