Granite vs Marble
Granite
Granite starts out as a molten mass of magma. It then forms into the granite rock as
this magma cools deep within the earth. Granites are generally classified differently
in the world of science as opposed to industry. Geologists classify rocks according to their minerals and origins. The stone industry, however, is more concerned with how
hard the stone is.
Marble
Marble is formed from limestone. The heat and pressure in the earth’s crust change the texture and the composition of limestone to form large grains and calcite. This is called recrystallization. Many natural stones, including limestone and travertine, are referred to as marble because the surface of the stone can be polished to a high gloss finish. True marble is produced through the changes in the structure of the stone due to metamorphic events. Marble is highly reactive to the acids found in vinegar, orange juice, and lemons. These acids will etch the stone and leave dull marks or rings.
