Answer:
rocks are made up of different minerals
in geology a mineral is a naturally occuring chemical compound that can be found in the ground and mountains
Step-by-step explanation:
example
schist is a rock
some of the minerals inside of schist are :
quartz , graphite and talc
quartz are used in watches
graphite are in pencils
talc used to be used for talcum baby powder
schist is found in the bedrock of new york and is very strong
thats why new york can have such tall buildings
wikipedia britannica bgsacuk opentextbcca massgov