"I'd uncovered agates, raw gems, petrified Wooden and several quite amazing rocks with pink and orange veins walking a three-mile stretch on a mountain road. I haven't got a rock tumbler so I polished them by hand. They turned out best. "..." additional Rated this short article: เหมาะสำหรับขจัดส่วนหนาของสนิมบนทุกแบบของโมลด์และเหล็กตาย ใช้ขัดแม่พิมพ์ ขัดเหล็ก https://beediadiamond.com/catalog/polishing-stones