นี่คือ หินน้ำมัน อเนกประสงค์รูปทรงหวี Acquire Precautions when sanding delicately crystals specimens. Prevent around-grinding and fracturing skinny edges and factors. As soon as the stone is rounded, use one hundred sixty-grit sandpaper to rub out the scratches from the rougher sandpaper. End sanding the rock using 360-grit sandpaper, then polish the stone https://beediadiamond.com/catalog/polishing-stones