Black tea is made from the leaves of a bush called Camellia sinensis. A process called oxidation turns the leaves from green to a dark brownish-black color. Oxidation means the leaves are exposed to moist, oxygen-rich air.
Marble is a non-foliated metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Geologists use the term marble to refer to metamorphosed limestone; however, stonemasons use the term more broadly to encompass unmetamorphosed limestone.Marble is commonly used for sculpture and as a building material.eologists use the term marble to refer to metamorphosed limestone; however, stonemasons use the term more broadly to encompass unmetamorphosed limestone.
Granite is a stronger and harder stone than marble is, which lends it a shiny, glossy appearance compared to marble's dull smoothness. However, with certain polishing sealants, modern marble can be made to look much glossier than it did in the past.he physical appearance of granite is very different from that of marble. Granite has a variety of speckled colors resulting from the melded stones within it â namely, quartz, feldspar, biotite mica, and sometimes amphibole â and comes in numerous shades and tones.