The deep shine we see on polished stone is achieved by rubbing the stone with a series of abrasive materials using a coarse abrasive grit, followed by finer and finer grits until the stone becomes smooth. The scratches left behind from one grit are removed by the next grit, creating finer and finer scratches. The process continues until the scratches are microscopic. The shine on the stone is achieved by abrading the surface to the point at which it becomes extremely smooth and starts to develop some reflective. The shine on the stone is thus a product of optics. So in order to achieve a deep shine on your stone, all that really needs to be done is to smooth it until it shines.Sounds simple enough, doesn't it? Unfortunately, the techniques employed to achieve this degree of smoothness require special knowledge and training. This is not friendly territory for the do-it-yourself.