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Is There A Place That Breaks Down The Components For Mexican Silver

 
 
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Pillar of the Community
United States
1906 Posts
 Posted 06/17/2019  8:09 pm Show Profile   Bookmark this topic Add Arkie to your friends list Get a Link to this Message
I was talking with someone associated with the Bill Moran School of Bladesmithing, and he was telling me that they had access to several knives that are purportedly from the Arkansas territorial period (i.e, 1836 and earlier). They were interested in testing the silver on the knives to see if it matched up with contemporary Mexican silver (coinage), but didn't have a basis for comparison. Is there a breakdown of the metals by percentage that would appear in Mexican silver somewhere?
Bedrock of the Community
Australia
15545 Posts
 Posted 06/18/2019  01:51 am  Show Profile   Bookmark this reply Add sel_69l to your friends list Get a Link to this Reply
Krause World coins catalogs give the fineness of various Mexican silver coins.
A potential problem in this case is
that I can see the possibility that the Mexican donor coins used may have had a range of fineness for various types, and the metal from these melted together

Perhaps better to test the silver fineness of the knives directly, using XRF analysis.

As a parallel:
I have seen Chinese cutlery that had utilized melted donor silver coins for the source for the silver. In that that case, the fineness turned out to be about .850 fine.
Pillar of the Community
United States
1906 Posts
 Posted 06/18/2019  06:46 am  Show Profile   Bookmark this reply Add Arkie to your friends list Get a Link to this Reply
I guess I didn't make myself clear. I wasn't seeking the percentage of silver, but of the trace elements that would be found in XRF testing. How much gold, how much lead, etc.
Pillar of the Community
United States
1649 Posts
 Posted 06/18/2019  09:44 am  Show Profile   Bookmark this reply Add Numismat to your friends list Get a Link to this Reply
This thread was a great read. In it swamperbob mentions 0.2% gold. http://goccf.com/t/259228
Valued Member
United States
264 Posts
 Posted 06/21/2019  4:26 pm  Show Profile   Bookmark this reply Add Rdwarrior to your friends list Get a Link to this Reply
I would suggest that if you have access to an XRF, then acquire a few Mexican coins of that era and run your own analysis and do a direct comparison. Sounds like your looking for the trace impurity's that probably won't show up on an official alloy spec of the era considering they didn't have the ability to check those impurity's back in the day.
Pillar of the Community
United States
1906 Posts
 Posted 06/22/2019  11:09 am  Show Profile   Bookmark this reply Add Arkie to your friends list Get a Link to this Reply
True, if I had access to an XRF, that would be a simple approach to take.
Pillar of the Community
United States
1451 Posts
 Posted Today  3H 46M ago  Show Profile   Check colonialjohn's eBay Listings Bookmark this reply Add colonialjohn to your friends list Get a Link to this Reply
Arkie - There is such a paper. Contact me privately.

John Lorenzo
United States
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