This is a great specimen of PGM bearing silver ore. It was found near Quartzsite, Arizona about 1995.

Quartzsite and Ehrenburg was part of what the old time prospectors referred to as the platinum triangle. In the old days this particular type of silver ore required a special technique when melting it into bars.

For many years the early Spanish prospectors used to refer to all silver-lead-platinum metal ores as hard silver.