1. The process of stone grinding is mainly divided into several steps. Rough machining, rough machining and fine grinding, fine grinding and polishing, and finally sandblasting. .

2. There are also methods to polish strange stones, such as carving, piercing, chiseling, cutting and sawing. They are all to change the shape of stones and make them more "strange".

3, some stones are suitable for oiling, you can use BB oil, olive oil, and it is best not to use vaseline. Oiling depends on different stones and whether the stones are coarse or not.