Rock density is very sensitive to the minerals that compose a particular rock type.
Is granite a carbonate rock.
Almost all dolomites are believed to be produced by recrystallization of preexisting limestones although the exact details of this dolomitization process.
Often the original structure of the carbonate rocks are modified during the metamorphism to render the marble unrecognizable from its original state.
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And if you know your igneous petrology you will see that the more mafic rich in magnesium and iron a rock is the greater its density.
Limestone or dolomite carbonate rocks are the typical base minerals.
Hardness of chalk is around 3 mohs.
Calcium carbonate is also the number one mineral at the marble spec.
Detrital which are formed of debris of limestone.
Calciocarbonatite magnesiocarbonatite and ferrocarbonatite are the three most common types of carbonatites according to this scheme.
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Carbonate rocks can be of various origins like.
Sedimentary rocks and granite which are rich in quartz and feldspar tend to be less dense than volcanic rocks.
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Igneous rocks with less than 10 carbonate minerals are carbonate or calcite bearing rocks.
Another way to classify carbonatites is to use the bulk chemical composition of the rock.
The recrystallization of the carbonate minerals result in marble.
Sedimentary rock sedimentary rock limestones and dolomites.
Carbonate rocks are also a class of sedimentary rocks that are composed primarily of carbonate minerals.
Limestones and dolomites are collectively referred to as carbonates because they consist predominantly of the carbonate minerals calcite caco3 and dolomite camg co3 2.
Marble is metamorphosed sedimentary carbonate rock.
Chalk is a sedimentary rock composed primarily of calcium carbonate.