Sedimentary rock

Sedimentary rocks are separated from debris in glaciers, rivers, winds, oceans, and plants, depositing rock deposits and solidified by millions of years of high temperature and high pressure.

1. Limestone: The main mineral component is calcite. Mineral particles and crystal structure are rare, and the surface is smooth and small in size. Hardness varies, and some dense limestone can be polished. The colors are black, gray, white, yellow and brown. Limestone is named after the limestone formed by seawater.

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

3, soapstone: formed by various talc, very soft. It is a hard-wearing, dense mine that is less prone to smudging.

4, fossils: containing marine shellfish, plant natural fossils, is considered to be limestone.

5, travertine (porous stone): generally cream or reddish, deposited from the calcite of hot springs. Because the water flows through the stone to form a lot of small holes, these holes are often filled with synthetic resin or cement, otherwise a lot of maintenance work is required. It belongs to limestone and marble.