Marble is a metamorphic rock. It is a metamorphism of limestone or dolostone and contains calcite and dolomite.
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Marble is a metamorphic rock that begins as limestone, a sedimentary rock composed mostly of calcite. Over time, the limestone is subjected to heat and pressure deep within the Earth's crust, causing it to recrystallize and form marble.
The Parthenon is primarily made of marble, specifically Pentelic marble quarried from Mount Pentelicus in Greece. The columns and other architectural elements are also constructed from marble.
A blue marble absorbs most colors in the visible spectrum except for blue, which it reflects, giving it its blue color.
Black
Yes, the term "blue marble" is often used to describe photographs of Earth taken from space that show the planet predominantly covered in blue due to its oceans. It is a way to symbolize Earth's beauty and fragility.
The Earth looks like a marble from space because of its spherical shape and the vastness of space surrounding it. When viewed from a distance, the planet appears as a small, round object due to its size in relation to the emptiness of space. Additionally, sunlight reflecting off the Earth's surface adds to its marble-like appearance.