ขอมูลทั้งหมดนี้ขอขอบคุณ อาจารย์อวยชัย สุภาพจน์ Polish your stones with a tumbler. If you don't have the time or inclination to shine stones by hand, You should use a tumbler. Select and kind your rocks by condition and hardness. Before you begin polishing your rocks, type them so which the rocks you set https://beediadiamond.com/catalog/polishing-stones