Tai Hu Rock jia shan ( Limestone Rocks)

Decorative rocks, sometimes termed Chinese scholar's rocks, are used both for structural and sculptural purposes. The sculptural Taihu rock is especially prized because it represents wisdom and immortality, and is only procurable from Tai Lake, just west of Suzhou. During the Song dynasty, they were the most expensive objects in the empire. Such rocks, combined with streams and pools, form the basis of a garden's plan. The Chinese word for landscape, shan shui, literally means "mountains and waters" while a common phrase for making a garden means "digging ponds and piling mountains".

Limestone Rocks
Limestone rocks are sedimentary rocks that are made from the mineral calcite which came from the beds of evaporated seas and lakes and from sea animal shells. This rock is used in concrete and is an excellent building stone for humid regions.

How Sedimentary Rock Is Formed
For thousands, even millions of years, little pieces of our earth have been eroded--broken down and worn away
by wind and water. These little bits of our earth are washed downstream where they settle to the bottom of the rivers, lakes, and oceans. Layer after layer of eroded earth is deposited on top of each. These layers are pressed down more and more through time, until the bottom layers slowly turn into rock.