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An explanation of how platinum is used in jewellery - in an alloy form - and why, and a description of different types of platinum jewellery alloys can be found on the "Platinum Today" website at: http://www.platinum.matthey.com/uploaded_files/publications/pdf2002/jewellery.pdf.

There is also more information and a list of several different platinum jewellery alloys at: http://www.noble.matthey.com/products/detail/index.asp?article=37.

Answer posted 9 February 2006