... , Rhyolitic Rocks2,000~3,000 hoursAndesite, Black Granite, Porphyrite2,000~3,200 hoursSyenite, Syenite Porphyry, Trachyte3,500~3,900 hoursBasalt, Diabase3,500~5,000 hoursSedimentary ... ,100 hoursEclogite, Gneissose2,000~3,000 hoursOther Applications Service LifeMining Debris2,500~5,000 hoursWastes2,800~4,500 hoursIron Pyrites3,000~4,000 ...