Protolith Of White Marble

Specimen is about 1 1 4 inches across about 3 centimeters.

Protolith of white marble. The characteristic swirls and veins of many coloured marble varieties are usually due to various mineral impurities such as clay silt sand iron oxides or chert which were originally present as grains or layers in the limestone. Marble is a metamorphic rock formed when limestone is subjected to high pressure or heat. This process generally increases the average grain size which gives marble its sparkling appearance. Marble is often the host rock for corundum spinel and other gem minerals.

The stone is named after the town of sylacauga alabama which is sometimes called the marble city. Physical properties of marble. This rock sample is not marble it is quartzite metamorphosed sandstone. Metamorphic rocks have protoliths and limestone or dolomite are the protoliths of marble.

Pure white marble is the result of metamorphism of a very pure silicate poor limestone or dolomite protolith. Marble may be snow white either if the protolith was very pure or if the rock has been bleached by a water rich fluid. The word marble derives from the greek màrmaron crystalline rock shining stone. Sylacauga marble has been called the world s whitest.

Tremolite marble the term marble in geology is restricted to metamorphic rocks in which the carbonate minerals have recrystallized. White mineral is calcite dark colored streaks are composed of graphite. In its pure form marble is a white stone with a crystalline and sugary appearance consisting of calcium carbonate caco 3 usually marble contains other minerals including quartz graphite pyrite and iron oxides these minerals can give marble a pink brown gray green or variegated coloration. Pure white marble is the result of metamorphism of a very pure silicate poor limestone or dolomite protolith.

In sufficient amounts these can affect the texture and color of the marble. A protolith is the parent rock. Width of sample 14 cm. This specimen is a piece of white marble with a large red ruby crystal from afghanistan.

An outcrop in karelia russia. The word marble derives from the ancient greek mármaros crystalline rock shining stone taj mahal india the taj mahal is built of makrana a white marble that changes hue with the angle of the light. A protolith is the parent rock. Sylacauga marble also commonly known as alabama marble is a marble that is found in a belt running through talladega county alabama.