Going to the quarry is not a good solution....
....go to the folks cutting it in the "capitol"...much better solution. There are a # of clors available. Marble, Travertine, coral limestone. Problem is that with so much cost in transportation that it often is not a "great deal" over some of the marbles being imported into countries from China. Now if you are talking about white coral limestone (not the red/white with lots of holes variety found in the capitol) as tile and other items then you want to look "towards the east" of the country....
I know some of these folks very well.....
Best, Dave