Simple:
* Limestone is a sedimentary rock.
* The cave was formed in limestone.
* The statue was carved from limestone.
Descriptive:
* The smooth, white surface of the limestone was cool to the touch.
* The limestone cliffs rose dramatically above the turquoise water.
* The ancient ruins were built from blocks of weathered limestone.
Specific:
* The limestone quarry provided the raw materials for the construction of the city.
* The fossils embedded in the limestone revealed the history of the ancient ocean.
* The limestone pavement was a unique and beautiful geological formation.
Figurative:
* The limestone walls of the canyon seemed to whisper secrets of time.
* The limestone formations were like giant sculptures sculpted by the wind and water.
The best sentence for "limestone" will depend on the context and the specific information you want to convey.