I went to your site. "According to James L. Murphy of Ohio State University, "Large white crinoid stems are common in the Upper Mercer and Boggs limestone units in Muskingum Co. and elsewhere, and these limestones are often very dark gray to black in color. You could find such rock at the Forks of the Muskingum at Zanesville, though the Upper Mercer limestones do not outcrop much further up the Licking." We therefore need not look any farther than the next county over to find a potential source for the stone, contrary to the previous assertion here that such limestone is not common in Ohio."
IOW, a fraud.