Is it possible to melt rocks?

Like everyday rocks that you find on the ground...

yes
with lots oh techey stuff

this is were minerals and ores are found, in every day rocks the miner colects the ore- surrounded by rock- then ships it off to be melted, in this prosses both ore and rock are usual melted, but you need amazingly high temperatures.

You need a heat source powerful enough to melt them. It really depends on the rock, but some rocks will not melt even at 1000 degrees Celsius! Alternately, you would need a powerful corrosive acid, such as sulfuric acid.

well rocks come from volcanoes erupting, they were all melted at some point. google it, it's pretty cool.

Yes - melted rocks are called 'lava'.

Yes. Heat them to a high enough temp, or pour hydrochloric acid on them.