metallic metals - Government of Manitoba

!I 1ICrystalline System Mineral Streak Colour and Habit Remarks IPentlandite bronze-brown pale bronze- isometric; hexoctahedral usually massive, in granularyellow but crystals rare aggregatesPetzite grE'Y Iblack grey to blackisometric; small cubica rare silvE'r-gold telluridecrystals (rare), usuallyfound in veinsImassive or compactPyritE' brownish black pale brass yellow isometric; pyritohedra, also massive'd:ranular,octahedra, strialed cubesreniform, no ular or stalac­ stalac-(common)titiePyrrhotitE' grE'vish black bronze hexagonal. monoclinic or magnetic pyrites; nearlyorthorhombic: tabular oralways massive. as granu larpyramidal crystals (rare)aggregatesSmythite dark grey black hexagonal (1); platy oxidation product from crystals with hexagonalpyrrhotite outlines Sphalerite pale brown to brown. black. isometric; crystals varied. zincblende; usually cleav­cleavwhitE'YE'llow, green often tetrahedral with able. granular and in masred.grey rounded faces; commonly sive aggregatestwinnedSylvanite pale grey silvery white monoclinic; thick tabular gold-silver telluride;or short prismaticusually bladed or granularTelluro- palE' grE'Y pale lead-grE'Y hexagonal; flexible, bismuth telluride; usually bismuthite inelastic laminae in foliated masses or (Wehrlite)irregular plates Tetradymite pale grev pale steel-grey hexaronal; crystals pyra-often contains sulphurmida , indistinct(Bi,S,); usually bladed, ,foliated or massive-granular;Tetrahedrite black to brown steel-grey to isometric: modifed letra- also massive or granular iron-blackhedral: crystals common; may be t\vinned tvvinned Violarile Violarite grE'Y pale grey with isometric; isometric: rarely if ever massive; granular to com­comvioletgrey shows crystallin'e form pacttarnish67