diamond-carbon ccolor and luster:white,colorless,pale shades of yellow,red,orange,blue,adamantine,greacy.cleavage:perfect,four directionscrystols:isometric,mostly octahedrons,less commonly dodecahedral,rarely cubic,usually with curved faces,also rounded,and irregular grainsbest field marks:extreame hardness and greasysimilar species:diamonds is mostly easily confused with quartz pebbles,but the luster and hardness of a diamond will suffice to distinguish one from another.environment:diamonds are mostly found or mined from placer sedimentary deposits,diamond is actually formed in pedridotite of plutonic rocks,where it associated with olivine,magnetite and phlogopite.occurance known:1867 in pike county,arkansas and gold placers mining of gravels in several northern mother lodes in california.gem stone data:colorless.fainted tinted,commonly known with yellow or brown and less commonly with green or blue,in fancy diamonds browns are very common,orange,violet,strong yellow red,blue,are the rarest.black diamonds are rarely used in jewelry.and bort and carbonado.
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