Sulfide Minerals硫化物矿物包括：硫化物、碲化物、砷化物·Chalcopyrite黄铜矿Chalcopyrite,CuFeS2,is the most important ore mineral of copper.Chalcopyrite(KAL-co-PIE-rite)usually occurs in massive form（非晶质）rather than in crystals,but its crystals are unusual among the sulfides in having a shape like a four-sided pyramid（四棱锥）(technically they are scalenohedra严格的说是偏三面体).It has a Mohs hardness of3.5to4,a metallic luster,a greenish black streak and a golden color that is commonly tarnished in various hues（呈各种晦暗色调）(though not the brilliant blue of bornite（斑铜矿的宝石蓝）).Chalcopyrite is softer and yellower than pyrite（黄铁矿）,more brittle（脆）than gold.It is often mixed with pyrite.Chalcopyrite may have various amounts of silver（银）in place of the copper,gallium（镓）or indium（铟）in place of the iron,and selenium （硒）in place of the sulfur.Thus these metals are all by products of copper production.硬度3~4，比重4.3~4.4，解理不佳，参差状至贝壳状断口，晶体呈假四面体，常呈双晶，晶面上有条纹。
