Sedimentary rock

Sedimentary rocks are deposits of rock that have been broken off by debris from organisms such as glaciers, rivers, winds, oceans and plants and consolidated over millions of years at high temperatures and pressures.

1, Limestone: the main mineral composition of calcite.Mineral particles and crystal structures are rare, and the surface is smooth and small granular.Hardness varies, and some compact limestone can be polished.The colors are black, gray, white, yellow and brown.Limestone contains lime formed by sea water, hence the name.

2. Sandstone: formed by quartz particles, stable structure, usually pale brown or red, mainly containing silicon, calcium, clay and iron oxide.

3, Soapstone: formed by a variety of talc, very soft.It is a wear-resistant, dense ore that does not stain easily.

4. Fossils: containing natural fossils of Marine shellfish and plants, which are considered as limestone.

5, Travertine (pore) : generally cream color or light red, from the hot spring calcite deposition.Many holes formed by water flowing through the stone are usually filled with synthetic resin or cement, which would otherwise require considerable maintenance work.Of limestone and marble.