What is stone and what makes it different from marble?
The term stone means the natural aggregation of minerals; in particular it is “an unpolishable construction rock” (a feature that clearly distinguishes it from marble).
Generally speaking, stone has a background colour on which a sort of pattern is created due to a variety of different coloured minerals.
Marble is a metamorphic calcium carbonate rock that witnesses a transformation process under the influence of temperature and pressure changes, until it takes on a granular and crystalline structure.