Final answer:
Marble countertops are made from metamorphic rock, specifically marble, which forms through the process of metamorphism.
Step-by-step explanation:
The natural stone product made from metamorphic rock is marble countertops. Marble is formed when limestone is changed by heat and pressure and recrystallizes into a light-colored rock. This transformation occurs through a process called metamorphism, which involves the alteration of the mineral composition and texture of the rock.