Note the bluing on this mushroom. The fact that Liver Boletes turn blue almost immediately after being exposed to air is a good identification tool. The photos below show more of the bluing.
This is the underside of the mushroom cap where the stipe (stem) has been removed. The tubes you can see around the opening are the mushroom's pores.
The stipe with pores on the top.
The longer the flesh of the mushroom is exposed, the darker the blue becomes.