Found this in a parking lot

[Ken3211]

Heavy nonferrous silver rock

 

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[loco oro]

May be galena, is it soft, galena is soft and brittle, and if you chip a piece, the fresh break will smell of sulfur,sand paper will bring a brilliant shine, if you try sandpaper do it under water, or you might end up loco like me lol

 

[Eu_citzen]

Will a knife scratch it? Results of a streak test?