How many middle class homes exist on the planet? Perhaps difficult to calculate, since the definition of middle class varies from person to person, country to country. An approximate number, with ' middle class' being defined in the western sense, would perhaps lead to number somewhere between 300 to 500 million. Assuming every such home has a dining table, this would also be the number of dining tables in the world.
Now how many dining tables in the world in the homes would be made of natural stone? How many thousands, let us be generous, how many tens of thousands? A tiny fraction, at best.