sedimentary rock

Sedimentary rocks are detached from debris in organisms such as glaciers, rivers, winds, oceans, and plants, depositing and forming rock deposits, which have been consolidated by high temperature and high pressure for millions of years.

1. Limestone: The main mineral composition is calcite. Mineral particles and crystal structure are rare, the surface is smooth, small particles. Hardness varies, some dense limestone can be polished. The colors are black, gray, white, yellow and brown. Limestone contains lime formed from seawater, hence its name.

2. Sandstone: It is formed from quartz particles and has a stable structure. It is usually light brown or red. It mainly contains silicon, calcium, clay and iron oxide.

3, soapstone: formed by a variety of talc, very soft. It is a wear-resistant dense mineral that is not susceptible to smudging.

4. Fossils: Containing marine shellfish, natural fossils of plants, considered to be limestone.

5, travertine (hole stone): generally creamy or light red, formed by the calcite of hot springs. Many holes are formed due to the flow of water through the stones. These holes are filled with synthetic resin or cement, otherwise a lot of maintenance work is required. Limestone and marble.