blackband Definition

ironstone, melaconite, ferrocalcite, jamesonite, babingtonite, boulangerite, coffinite, pyrosmalite, fahlband, chalybite, ripidolite, colcothar, stannite, helvite, oxalite, schreibersite, strontianite, chloropal, garnierite, proustite, cubanite, glaucodot, holosiderite, cobaltite, skutterudite, pyritology, tennantite, daubreelite, cerargyrite, lazulite, freieslebenite, metallochromy, triploidite, ilvaite, chalcanthite, polybasite, aurichalcite, ehlite, tyrolite, stromeyerite, pedalfer, stephanite, menaccanite, halotrichite, argyrodite, septarium, oligosiderite, lucullite, lepidomelane, germanite, libethenite, annabergite, smaltite, cacoxenite, pigeonite, euclase, dufrenite, miargyrite, mesosiderite, ullmannite, chamosite, kobellite, caledonite, xylanthrax, karpholite, nontronite, lepidocrocite, liroconite, hausmannite, irestone, gummite, sterrometal, kerolite, knebelite, viridite, pyrognostics, datolite, volborthite, hauerite, manganiferous, warwickite, bournonite, dyscrasite, brochantite, nickeline, sesquisulphide, linnaeite, atacamite, triplite, hematinon, horn silver, eucairite, serpentinize, gahnite, ludlamite, bessemer steel, spiegeleisen, chondrodite, pectolite, zinkenite,