While marble is slightly harder and denser than limestone both rate very low on the mohs scale a rating used to measure the hardness of stones.
Limestone turns to marble.
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When the heat and pressure hits the limestone calcite seed crystals form.
Because marble is a fairly soft material only a three on the mohs hardness scale it is easy to cut and carve.
It is composed primarily of the mineral calcite caco 3 and usually contains other minerals such as clay minerals micas quartz pyrite iron oxides and graphite under the conditions of metamorphism the calcite in the limestone recrystallizes to form a rock that is.
Limestone generally ranks at around a 3 on the scale while marble falls between 3 and 4.
Marble and limestone lie at the opposite end of the hardness scale from granite.
What is the process of metamorphism when limestone turns into marble.
When sulfurous sulfuric and nitric acids in polluted air and rain react with the calcite in marble and limestone the calcite dissolves.
With continued metamorphism these crystal seeds grow while any clay deposits in the limestone transform into silicate structures such as mica.
I m doing an essay and i need a detailed explanation of how limestone is turned to marble.
They appear to be bleached out.
Fossilized materials in the limestone along with its original carbonate minerals recrystallise and form large coarse grains of calcite.
I know that it needs to be put under great heat and pressure but i want to know what kind of heat and what kind of pressure.
These forces cause the limestone to change in texture and makeup.
Marble is formed through the metamorphism of limestone.
Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism.
Polished marble and limestone will lose their gloss and become matt.
Marble is formed from limestone by heat and pressure in the earth s crust.
In exposed areas of buildings and statues we see roughened surfaces removal of material and loss of carved details.
When limestone is buried and put under intense heat and pressure why does it turn to marble instead of thermally decomposing into calcium oxide and carbon dioxide.
There is no treatment to avoid a limestone or marble from getting matt or losing its gloss but there is a possibility to refresh the colour of the stone easily with single component chemical agents instead of a time consuming re polishing.
