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HippoCampus Environmental Science 9 Online
OpenStudy (anonymous):

Minerals are considered to be a. extremely rare and valuable b. the building blocks of rocks c. difficult to find d. made out of rocks

OpenStudy (anonymous):

the answer is letter C.

OpenStudy (anonymous):

Minerals are the building blocks of rocks. Without minerals rocks wouldn't be formed. Some not ALL minerals are rare and valuable.

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