Why is platinum made with different alloys?
platinum guild
Q: Why is platinum made with different alloys like iridium or
ruthenium? Is there a desired combination of alloys for fine
jewelry?
A: Platinum in its pure state is very soft and cannot be used for
jewelry. In order to give it hardness, platinum is alloyed. To
determine which alloy to use, first look at the manufacturing
method…
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http://platinum.ganoksin.com/blogs/2008/10/17/