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Which of the following minerals can not be scratched by quartz?

licha77x7 German 1 41

Which of the following minerals can not be scratched by quartz?

Posted by licha77x7 | Posted at Mar 13, 2009 | Categories: German

Answers

Bussiere600
Bussiere600

Welche der folgenden Mineralien kann mit dem dem Quarz nicht zerkratzt werden?

Mar 13, 2009 07:22

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