Rocks are useful because without them, we wouldn't exist. They make tools, games, ect.
(I'm sure you can find a more in-def answer, I just answered this because it HAD no answer. Feel free to edit.)
rocks and minerals
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.
ores are rocks that are mined
slate and marble
I need the answer
Radiometric dating is least useful for dating sedimentary rocks because they are formed from the accumulation of sediments, making it difficult to determine the original isotopic composition.
Rocks may help in building stable stone structures, such as fireplaces, bridges, and houses.
In order to be useful in determining the relative ages of rocks, an indicator must provide different indications for rocks of different ages, right? So how could something which doesn't change over time be useful?
It is not useful in dating rocks. Only organic substances in terrestrial conditions. No carbon in rocks.
Limestone is the rock that is most useful to modern industrial countries because it is the source for the main ingredient in cement.
Valuable minerals, useful material, and eventually consumer products.
Index fossils