The stone can be dated, reasonably, but the engraving cannot. Mormons have tried to make a similar claim regarding personal use decalogue stones found in Ohio near an Indian burial mound. The truth is radically different from the LDS inc explanation, but they continue to make their outrageous claims, even teaching the lie as fact in BYU classes.
Focus on TRUTH. When you get down, it is a LONG way back to the top.