Presidential Address: Platinum Perspectives - Introduction

Cramer, L. A.
Organization: The Southern African Institute of Mining and Metallurgy
Pages: 8
Publication Date: Jan 1, 2001
Platinum metal was first utilized by the Inca civilization in South America where it was found in alluvial deposits along the San Juan and Atrato rivers that lie between the Andean mountain range in Colombia and the Pacific Ocean. The nuggets found in these rivers average between 77% and 86%platinum, 7%?8% iron and small amounts of copper, gold and other Platinum Group Metals (PGMs). The Incas often alloyed platinum with copper to increase its workability and fabricated various ornaments from it.
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