* Marble is indeed a metamorphic rock. It forms when limestone (its parent rock) is subjected to heat and pressure. This process changes the texture and composition of the limestone, transforming it into marble.

Here's why this is a good example of the metamorphic rock cycle:

* Parent Rock: Limestone is a sedimentary rock made primarily from the mineral calcite.

* Metamorphic Process: When limestone is buried deep within the Earth, it encounters high temperatures and pressures. These conditions cause the calcite crystals within the limestone to recrystallize and become interlocked.

* Metamorphic Rock: The resulting rock is marble, characterized by its unique veining and ability to polish.

In short: Marble is a metamorphic rock, and its parent rock is limestone.