Lime (calcium oxide, CaO) itself cannot be directly transformed into a metamorphic rock. Metamorphic rocks form from existing rocks (igneous, sedimentary, or even other metamorphic rocks) under intense heat and pressure.

Here's why lime wouldn't form a metamorphic rock:

* Chemical Composition: Lime is a simple chemical compound. Metamorphic rocks are generally composed of complex minerals.

* Origin: Lime is typically produced by heating limestone (calcium carbonate, CaCO3) to drive off carbon dioxide. This is a chemical process, not a geological one.

* Metamorphic Processes: Metamorphic rocks are formed through processes like recrystallization, mineral transformation, and deformation. These processes require existing solid materials with complex mineral structures.

However, lime can be involved in the formation of some metamorphic rocks indirectly.

* Marble: Limestone is the source rock for marble. Marble is a metamorphic rock formed from limestone under heat and pressure, which causes the calcite crystals in the limestone to recrystallize.

* Skarn: Lime can be involved in the formation of skarns, which are metamorphic rocks formed near igneous intrusions. The heat from the intrusion can cause chemical reactions between the limestone and other minerals, leading to the formation of new metamorphic minerals.

So, while lime itself cannot be transformed into a metamorphic rock, it plays a crucial role in the formation of some important metamorphic rocks like marble and skarns.