Question

which rock is made up of very hard rock​

Answer 1

Answer:

Explanation:

Unlike granite, in which the crystals are randomly arranged, the crystals in gneiss are lined up and in layers. Gneiss is a tough and hard rock. What minerals make up the rock? Almost always: feldspars, quartz, and mica.

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Answer 2

Answer:

Unlike granite, in which the crystals are randomly arranged, the crystals in gneiss are lined up and in layers. Gneiss is a tough and hard rock. What minerals make up the rock? Almost always: feldspars, quartz, and mica.

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