What’s the
difference between marble and granite?
Although both are stones and both are quarried from the
earth, granite and marble (and marble’s relatives – limestone, onyx and
travertine) are very different from each other. Granite is formed deep
in the earth’s mantle at extremely high temperatures, and is a very
hard, resistant stone made of crystallized minerals.
The marble family
– limestone, travertine, marble, onyx – starts out as sediment – animal
skeletons and shells, plant matter, silt – at the bottom of bodies of
water. After millions of years this solidifies (lithifies) into stone.
Because its main component is calcium, it can be affected by acids such
as vinegar and citrus beverages.
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