When you don’t want to make use of a chisel or hammer, rub the stone above a slab of concrete to break off any protrusions. เครื่องเป่าใบไม้ ดูดใบไม้ ใช้แบตเตอรี่ This really is obtained through the frequent friction amongst the rock and the polishing medium, a method you could mimic by hand https://beediadiamond.com/catalog/polishing-stones