Thank you for that photo. It looks like this is a 1/8" granite. I could buy 1/8" granite by the ton from a local rocker. It is the slightly smaller stone that is 1/16" to 3/32" that is extremely hard to find.
At a rocker, you will find crushed granite products that are 1/8" screened (the fines are removed). Alternately, you will find 1/4" with all the fines included. You could filter out the fines with a 1/16" sieve, but for hundreds of pounds that I need that is too time-consuming.