20 years of experience in the manufacturing of agate Mortars with pestle for laboratories guarantee our products.These mortars are made of Agate of best quality.They have many advantages comparing with others similar ones because: They have most durability when facing abrasion Remainders do not stay in them when proccessing substances because the interior cavity and the end of the pestles are polished They are very strong They do not break into pieces with facility, so that they are more resistant than other materials. Te invito a que visites nuestra web para que puedas ver lo que te ofrezco: http://www.exportpiedras.com