Recently it signed a contract to provide 11 million tonnes limestone annually to India, to be used in steel factories for purifying the steel, a process requiring high quality limestone, and the stone quarried
here is amongst the purest in the world.
slabs were thinned and shaped by bifacial flaking, then hammer-dressed on both faces to produce 'dressed' grindstone blanks (Figure 4), similar to those at the Innamincka quarries.
According to Duffe Elkins, director of sales for the Indiana Limestone Company of Oolitic, Indiana, the limestone for 15 Central Park West is coming from the Empire Quarry from a deposit just a few hundred yards away from where the same Indiana Limestone was quarried
for use on the Empire State Building, which recently celebrated its 75th anniversary.