Marble, limestone, dolomite
Category：Information Publish：2015-07-21 10:24:59 View：1930次
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Stone circles are usually such a problem: sometimes a particular stone looks "was not able to live up to its name." Marble, limestone and dolomite difference between difference and maybe only professionals can differentiate to a large extent, for most building owners, they only pay attention to the appearance of the stone, to which stone is used may not care about.
However, in many cases, differences between these types of natural stone is very important, at least for the end user, understand this difference of several seemingly the same stone, helping them at the time of purchase can make a comprehensive comparison.
Below we detail the characteristics of marble, limestone and dolomite.
Marble
Marbles are also called spoiled or re-Crystal limestone. Real marble is calcitic rock metamorphic rocks, and has a crystal structure. Marble is based on regional metamorphism of stones derived from limestone, and generally containing large, rough crystals, calcite components accounted for more than 99%. Crystals can be seen with the naked eye, especially in the section.
Most of the typical limestone pore density is less than 1%, marble compared with, the much greater density. Because of its crystal structure, many of the marble is translucent, General Visual thickness exceeding 30 cm, and non-crystalline limestone is not transparent. Marble, because of the origin and composition of different, different colors of natural stone.
In the construction industry, people talk about marble usually refers to include limestone, dolomite and serpentine, a variety of stones. United States marble Institute provides: all natural lime used for commercial quality brightness and polishing rocks are referred to as marble, including dolomite and serpentine.
Limestone
Limestone, calcium carbonate called calcite, hardness values (MOH) 3.
Limestone is a kind of mineral composition of rocks contains a single calcite calcite components accounted for 95%, which contains small amounts of minerals, dolomite, siderite, quartz, feldspar, mica, and can reflect the stone color of clay minerals. Composition of pure limestone is white. Siderite and limonite have patterns and colours are yellow-brown limestone, such as blood-red, sea green, green chlorite until black, asphalt grey.
Made in sea water in the limestone from plant and animal bone fragments, stone grey mud physical changes of organic matter in seawater and other components. These organisms died, carbonate is soluble in water, piling up at the bottom, gradually forming calcium carbonate shells and mass organizations. Limestone is usually cut, found intact within the stone or fossil was destroyed.
Unless the limestone reefs, in General, from the sea of limestone has a layered structure. Its organizational structure may be a dense, granular pores.
Dolomite
Dolomite is mainly composed of calcium magnesium carbonate, hardness (MOH) are between 3.5 and 4.
Dolomite is mainly composed of calcium carbonate and magnesium carbonate. This seems very close to the limestone stone in appearance, in fact, found in limestone areas of sediments also often found in dolomite. Most dolomite sediments contain a certain proportion of limestone. Differences important basis of dolomite rock dolomite in mineral content of not less than 50%. In addition, dolomite is the porous stone. Due to form the chemical composition of dolomite not sensitive to acids, dolomite has better durability.
Generally speaking, people often used hardness test and the acid test this method to distinguish between limestone and dolomite.
However, in many cases, differences between these types of natural stone is very important, at least for the end user, understand this difference of several seemingly the same stone, helping them at the time of purchase can make a comprehensive comparison.
Below we detail the characteristics of marble, limestone and dolomite.
Marble
Marbles are also called spoiled or re-Crystal limestone. Real marble is calcitic rock metamorphic rocks, and has a crystal structure. Marble is based on regional metamorphism of stones derived from limestone, and generally containing large, rough crystals, calcite components accounted for more than 99%. Crystals can be seen with the naked eye, especially in the section.
Most of the typical limestone pore density is less than 1%, marble compared with, the much greater density. Because of its crystal structure, many of the marble is translucent, General Visual thickness exceeding 30 cm, and non-crystalline limestone is not transparent. Marble, because of the origin and composition of different, different colors of natural stone.
In the construction industry, people talk about marble usually refers to include limestone, dolomite and serpentine, a variety of stones. United States marble Institute provides: all natural lime used for commercial quality brightness and polishing rocks are referred to as marble, including dolomite and serpentine.
Limestone
Limestone, calcium carbonate called calcite, hardness values (MOH) 3.
Limestone is a kind of mineral composition of rocks contains a single calcite calcite components accounted for 95%, which contains small amounts of minerals, dolomite, siderite, quartz, feldspar, mica, and can reflect the stone color of clay minerals. Composition of pure limestone is white. Siderite and limonite have patterns and colours are yellow-brown limestone, such as blood-red, sea green, green chlorite until black, asphalt grey.
Made in sea water in the limestone from plant and animal bone fragments, stone grey mud physical changes of organic matter in seawater and other components. These organisms died, carbonate is soluble in water, piling up at the bottom, gradually forming calcium carbonate shells and mass organizations. Limestone is usually cut, found intact within the stone or fossil was destroyed.
Unless the limestone reefs, in General, from the sea of limestone has a layered structure. Its organizational structure may be a dense, granular pores.
Dolomite
Dolomite is mainly composed of calcium magnesium carbonate, hardness (MOH) are between 3.5 and 4.
Dolomite is mainly composed of calcium carbonate and magnesium carbonate. This seems very close to the limestone stone in appearance, in fact, found in limestone areas of sediments also often found in dolomite. Most dolomite sediments contain a certain proportion of limestone. Differences important basis of dolomite rock dolomite in mineral content of not less than 50%. In addition, dolomite is the porous stone. Due to form the chemical composition of dolomite not sensitive to acids, dolomite has better durability.
Generally speaking, people often used hardness test and the acid test this method to distinguish between limestone and dolomite.
