Then you would know that supplies cannot meet the global demand...

Then you would know that supplies cannot meet the global demand for all grades of silica sand, from lower grade construction to the highest purity grades. It's a well documented fact, and no amount of illegal exports will ever fill that void. And you would also know that Muchea is one of the largest and highest grade natural deposits in the world.
There is immense pressure to halt the illegal sand extractions going on in several asian countries,its becoming like blood diamonds, run by cartels that seem to stop at nothing. But on a global scale its a drop in the ocean.
It seems odd that you would rather do business with these types, than a legitimate Australian business that is set to grow rapidly.
Anyone can get a quote, but have they delivered and have you paid your blood money?