I found a exposed ledge that had this type of material and I am trying to identify with out yet going to an assay office. Well at least until I get more samples of other materials to make it worth the min. charge. It is very decomposed and I was thinking it might be ore containing silver sulfides. From what I been reading, there are many forms that silver can be locked into. I found this in the Pershing County, Nevada area that is know for silver mining. This piece I saved whole, and you can see the formation like a "V" shape. Much of the surrounding material is easily broken up and made powdery ( not fine but somewhat coarse). If anyone out there would have any ideas?