I know! He's rubbish at his job! What does he know about rocks?
I just can't believe our geologist! He's absolutely clueless!
I have no idea why our maid suggested him...
I apologize, but the Queen and her sister should've came by now. Meanwhile, could
You tell me something about rocks? if you don't mind, of course.
Of course I don't mind! what kind manners you've got! I would've let you free.
While the Queen whined, the slave fidgeted awkwardly around the guest...
It all starts with magma, my friend. When magma erupts out of a volcano, which is now called lava, cools. Which also leads to the formation of Igneous Rock, like Pumice, Granite or Obsidian.
...till the end of time.
Weathering and Erosion lead to the cause of rock breaking apart and flying away in little pieces called sediments. Once they get deposited, they get cemented & compacted and turn into the world-famous, Sedimentary Rock.
If heat and pressure is added to the Sedimentary rock, it gradually turns into Metamorphic Rock over time. If you add some melting into that, you'll get magma, which will shoot out of a volcano again, causing the rock cycle to start over again, and again. Till the end of time.