Calcite, marble, dolomite, marble how to distinguish?
Dolomite ores are mainly composed of calcium carbonate and magnesium carbonate. This stone appears in appearance is very close to the limestone, in fact, found in the limestone deposits of the area, will often find dolomite. Most dolomite deposits contain a certain proportion of limestone. The important basis for distinguishing dolomite is that dolomite content of rock is no less than 50%. In addition, dolomite is porous stone. Dolomite is more sensitive to acid than chemical composition of dolomite.
In the construction industry, marble is often referred to as a variety of stones, including limestone, dolomite and serpentine. The provisions of the United States Association for all: marble with natural calcareous and polishing brightness of the rock known as the marble business, including dolomite and serpentine.
The density of most typical limestone pores is less than 1%, and marble is much more dense than that of marble. Because of its crystalline structure, many marbles are semi transparent and generally visible beyond 30 cm in thickness, while crystalline limestone is opaque. Because of the different marble origin and interior composition, the color of natural stone is different.
Marble is also called metamorphic or recrystallized limestone. The real marble is a metamorphic rock calcite, and crystal structure. Marble is derived from limestone by the metamorphism of regional stones. It usually contains large, coarse crystalline crystals, in which calcite accounts for more than 99%. Crystals are visible to the naked eye, especially on their cross sections
