for marble and limestone what is the economic value importants 2 the market place?

Answer 1

marble is largely used for decoration and architectural uses- trophies, statues, walls, floors, window sills, counter tops, etc.

limestone is used the same as marble plus also has other industrial uses. here are a few that come to mind:
-flux agent in iron making
-neutralizing agent for acid drain systems
-colorant for making grout and cement bright white

Answer 2

Others step aside - I'm the marble-cleaning queen! I used to clean marble showers in apartments and have spent untold hours on this. I'm assuming you mean fabricated marble.... Use a commercial cleaner that is safe on marble (there are plenty out there), a scrubby pad, and ELBOW GREASE (since marble can't take harsh chemical cleaners, there's really no other way). Do a small section at a time. A razor blade (in a holder) works great on soap scum and deposits, as long as you're careful. Once clean use a polish or wax (car wax works great) to coat and protect it. If it's shower walls, buy a plastic squeegee and wipe the walls down after each shower. It only takes a minute but will keep the walls clean indefinitely.