砌
=
石
+
切
:
The queen of hearts (qi) wants to build a new shower wall in the space station's bathroom (Ø4) by laying bricks (砌). To get the bricks she's cutting (切) rocks (石) with her bare hands.
砖
=
专
+
石
:
The scientist (专) and Julian Giant Squid (zhu) are standing next to a rock (石) in front of the anthill (an1). They are quietly thinking for a long time, until the scientist has an idea and tells Julian Giant Squid what to do in order to create bricks (砖) out of the rock (石).