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https://www.gemsociety.org/article/jewelry-metals-overview/
Rhodium frequently sees use as a non-tarnishing plating for white gold, silver, and other platinum group jewelry metals. Palladium and iridium are commonly alloyed with other metals or used alone to make jewelry pieces. The most common platinum alloys include 90% platinum and 10% iridium…
https://www.ganoksin.com/article/platinum-alloy-applications-for-jewelry/
Platinum Gold alloy, systems, because of the wide temperature range observed during Solidification, require a rapid cooling, or they become hard and porous. One feature of these alloys is the fact that they can be age hardened. Heat treat these alloys …
https://www.langantiques.com/university/platinum-2/
The earliest references to the use of platinum are to be found in Egypt at the time of the Old Kingdom. Specks of platinum group metals occur in ancient Egyptian gold work as a ‘contamination’. Because of platinum’s high density, chemical inertness and hardness, it remained with the gold …
https://newatlas.com/platinum-gold-alloy-worlds-most-durable/55936/
Aug 17, 2018 · Engineers at Sandia National Laboratories have developed what they say is the most durable metal alloy ever created. Made up of a combination of platinum and gold, the new material …
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