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How PGMs Affect Assay Beads

Most fire assayers are trained to observe the cupelled beads very carefully, noting any discoloring or surface roughness that might indicate that one or more of the platinum group metals (PGMs) are present. The “clues and tests” I have included in this article stem from several sources, including my 35 years of experience performing torch assays...

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Putting this information together, we conclude that the coming year of 2007 could hold explosive growth for the precious metals as the probability of an international “accident” rises, as the dollar comes under increasing pressure and as the fundamental demand for resources of all types from India and China plus other developing nations grows relentlessly.

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