I was looking up some info on gold on San Fransisco beaches, and came across this U.S. Geological report:Occurrence of platinum in a black sand from a beach
deposit in San Mateo County, California
Here is a link to the pdf:
https://pubs.usgs.gov/of/1991/0308/report.pdf
Anyway, while reading the report, I came across this:
the platinum appeared as tiny rounded grains that looked
like silvery beads. No crystal faces w ire present on any platinum
grain. All platinum grains were slightly magnetic,
I have come across this very same type of tiny silvery beads before in Cajon Creek while panning out cons. Very samll, silvery, slightly magnetic.
deposit in San Mateo County, California
Here is a link to the pdf:
https://pubs.usgs.gov/of/1991/0308/report.pdf
Anyway, while reading the report, I came across this:
the platinum appeared as tiny rounded grains that looked
like silvery beads. No crystal faces w ire present on any platinum
grain. All platinum grains were slightly magnetic,
I have come across this very same type of tiny silvery beads before in Cajon Creek while panning out cons. Very samll, silvery, slightly magnetic.
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