Professional Mortar And Pestle: Suitable For Ordinary Households, Miners, Geologists, Etc. Mainly Use It To Find Out If Ore/Rocks Contain Gold Or Other Precious Minerals. After Crushing, Place Material Into Gold Pan Then Pan Material And Examine For Gold Traces. | | Multifunctional: With Our Rock-Ore Crusher, You Can Easily Crush Rocks To Any Size And Even Pulverize Them To Powder If Desired. Also Works For Everything That Needs To Be Crushed, Such As Grinding Herbs, Spices, Seasonings And Pastes. | | Excellent Design: Deeply Rounded Well Keeps Rocks From Splashing, Very Effective At Grinding Rocks And Ore; Electric-Free And Battery-Free For Labor Saving, Easy To Operate. | | Premium Material: Crafted From High Standard Cast Steel For Great Durability Strength And Stable, Wear Resist, Great For Testing For Gold. The Inside Of The Mortar Has Been Polished Many Times.The Grinding Capacity Is 3-4 Times That Of Ordinary Mortar Pestle. | |