Difference between LIGHTWEIGHT MARBLE and TRADITIONAL MARBLE

A distinction is necessary between lightweight marble and traditional marble underlining however the peculiarity that unites them: both are natural elements.
So what distinguishes lightweight marble (or lightened marble) from traditional marble?
Simply, lightweight marble is nothing more than traditional marble reduced to a thin thickness to lighten its weight.
It seems simple put like this, but that’s actually not the case, as thinness means greater fragility.