Mother nature took 350 million years to produce your Arkie and she did it well. It is 99% silica there is nothing better. But It is a different animal. I keep reading people wanting to burnish the Arkie that is a bad idea. I the old days oil was use to keep the arkie from loading up. Let me repeat that one "loading up the stone" There is no such thing as burnishing an arkie . If you use a chisel or and ax on it until it is smooth you only "loaded the stone" This is like buying mud grips for a 4x4 truck and then cutting the tread off the tires and wondering why it goes trough the mud slow or not at all. It is a myth burnishing the Arkansas .