Limestone is the rock that is most useful to modern industrial countries because it is the source for the main ingredient in cement.
Granite is a durable rock which has been useful in step construction.
sedimentary
Mineral content
In classifying rocks, there are many properties that can be useful. In my opinion, either color or texture is most useful in classifying a rock or mineral.
The property of cleavage or fracture would be most useful in identifying the unknown rock. Cleavage refers to the way a mineral breaks along flat surfaces, while fracture refers to how it breaks when no cleavage is present. These properties can help to determine the mineral composition of the rock.
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The rock would be considered an ore.
The rock would be considered an ore.
Some yes,some,no. There are uesful and not-so-useful in both sexes. It really depends on your definition of "useful".
Yes.
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maybe copper
ore
slate and marble
flat rock buy the sea level.
Granite is one kind of hard rock.