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.
Marble is limestone that has been pressed by the earthâs pressure to produce a hard substance of crystals and beautiful lines and colors. Marble can have nearly any coloring, from blacks to white, and with a number of fantastic colors in between such as green and pink.ranite is an igneous rock (formed by heat) found deep within the Earth's crust. Once quarried, cut, polished, & sealed granite is nearly impervious to scratches, heat, etching, staining, or weathering. It is truly one of Mother Nature's most versatile and beautiful creations.