"I Had identified agates, raw gems, petrified wood and some fairly great rocks with pink and orange veins walking a three-mile stretch over a mountain road. I don't have a rock tumbler so I polished them by hand. They turned out best. "..." extra Rated this short article: งานหินขัดหรือ เทอร์ราซโซ https://beediadiamond.com/catalog/polishing-stones