Why does quartz lack cleavage planes?单项选择题

A

because it is a very soft mineral that breaks very easily

B

because it is an unnatural mineral grown in labs and thus, does not behave like a typical mineral

C

because it is a plate-like mineral that forms thins sheets that are very strong and do not break

D

because it is a framework silicate and has strong, covalent bonds in all directions

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How many cleavage planes do the minerals shown in the image below have?

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