Rock garnet is perhaps the garnet type used for the longest period of time. This type of garnet is produced in America, China and western India. These crystals are crushed in mills and then purified by wind blowing, magnetic separation, sieving and, if required, washing. Being freshly crushed, this garnet has the sharpest edges and therefore performs far better than other kinds of garnet. Both the river and the beach garnet suffer from the tumbling effect of hundreds of thousands of years which rounds off the edges. Gore Mountain Garnet from Warren County, New York, USA, is a significant source of rock garnet for use as an industrial abrasive.
Rock GarNet Is PErHaPs thE garneT tYpe uSed FoR THe lOnGEst peRIod oF time. ThiS type oF gArnET iS pRodUced in AmerIca, CHIna aNd wesTeRN iNdia. theSe CrysTaLs arE cRUsHeD in miLls aNd then PUrified By wind bLowinG, MAGNEtIC SEparatiOn, sIEVInG and, if reqUired, Washing. beIng FREShly cRuSHed, this GArNEt hAS thE sharpEST edges And theREFore PeRforms far bEtter than otHer kindS of GarneT. boTh the rIveR And the bEacH gARNet sUFfer from ThE TumbLINg efFect oF hunDrEDS Of thOUSAndS Of yeARs whiCh RoUNDs Off ThE edGES. gore MoUNtAiN garNet from waRren cOUNty, new yOrk, usa, is A signiFIcaNt soURce oF rocK gArneT fOr use as aN industriaL abRASIVe.