Rock Crusher Cast Iron Mortar and Pestle Rock-Ore Crusher Spice Grinder Thai Mortar and Pestle (Large Diameter 6.5'')

[Application] This large diameter rock crusher can be used for gold panning, ore expeditions, gold mine trips or for science classroom making, glass fusing, etc. where low cost and safe crushing is required. Use it to find out if ore/rocks contain gold or other precious minerals.. [Design]: At the top of it, we have designed a square pouring port and added groove edges to facilitate the smooth removal and movement of powder particles. At the same time, we are equipped with a rubber top cover to