How to Identify Black Minerals ThoughtCo
Aug 19,2017This mica mineral forms shiny,flexible flakes of a deep black orsphalerite) or other colors (diamond,fluorite,garnet,plagioclase,spinel).
mineralogy of marble from the jm huber mine,georgia marble district
Representative samples of Georgia marble from the J.M.Huber mine were collectedRound grains of quartz (relict quartz sand ?) form distinct layers in the marble.Amphibole,chlorite,phlogopite,colorless white mica,and plagioclase occur in the marble.A mineral identified in hand sample as garnet proved to be humite.Contact Us