"I'd located agates, raw gems, petrified Wooden and some really amazing rocks with red and orange veins walking a 3-mile extend with a mountain highway. I don't have a rock tumbler so I polished them by hand. They turned out best. "..." more Rated this short article: งานหินขัดหรือ เทอร์ราซโซ เป็นการสร้างพื้นผิวอาคาร https://beediadiamond.com/catalog/polishing-stones