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best guess of this silvery metal please

0 votes
upon detecting metal in the bedrock of a wash/dry creek bed I excavated out a flat piece of non-megnetic metal that I'm not sure of what it is. It has a SG of 11.68 with water @ 34degF, when tarnish is scratched color is silver, it conducts electricity and when soaked in 70% Nitric the tarnish comes off but the metal doesn't melt. Can anyone tell me what this may be, please? Mohave County, AZ
asked Apr 10, 2016 by mlarryh (150 points)
edited Apr 10, 2016 by mlarryh

2 Answers

0 votes
I would say it is silver.
answered Apr 11, 2016 by Weasel (58,940 points)
Thank you so much for answering Weasel. That was one of the metals I thought it would be until using the nitric acid which I thought was supposed to disolve silver......? I'm new at this stuff so have been reading whatever I can find to try to figure this out. If I leave the metal in the acid longer will it completely disolve if it's silver? It's been in there for about 15 hours... So the powdery residue that was the tarnish is most likely hydrogen sulfide you think? or some natural alloy or.....? Thanks again, I appreciate your thoughts......
.Please verify this silvery metal
0 votes
Can you please post some pictures as well?
answered May 6, 2016 by hershel (52,800 points)

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