The countertop is something called
Silestone. It's made out of 90%+ quartz, so it's heat and scratch resistant like granite, but it also requires less maintenance than granite. It never needs to be sealed.
It comes in a bunch of different colors, many of which are pretty sparkly, but the one we got is pretty close to flat black (Black Tebas). Actually, the big reason we went with it was that it has less shine than Absolute Black granite (which is also low maintenance).
I really wanted a matte black surface, but all of the options (like slate and honed granite) come with too many downsides.
When I grow up, I want to have a kitchen just like this! 
