Searching for Platinum Jewelry Composition information? Follow the links below to find all the information you need and more.
https://www.consumer.ftc.gov/articles/0294-platinum-jewelry
About Platinum Jewelry Platinum jewelry is rarely 100% pure platinum. Usually, the platinum is mixed with similar metals or non-precious base metals. Generally, the higher the percentage of pure platinum, the higher the value of the jewelry.
https://www.brilliance.com/education/metals/platinum
Jun 11, 2015 · 950 Platinum Pieces marked with a 950 purity are a blend of 95% platinum and 5% alloy metals (usually ruthenium, copper, cobalt, iridium, rhodium, or palladium). 900 Platinum Pieces marked with a 900 purity consist of 90% platinum and 10% alloy metals (usually ruthenium or iridium).
https://platinumjewelry.com/why-platinum/pure/
Look inside a piece of platinum jewelry and you’ll see its purity stamp. The Federal Trade Commission demands specific marks for the content of any precious metal alloy. To protect American consumers, a high-content platinum alloy will be marked 950Pt, 950, plat or platinum, meaning that it’s at least 95% pure, elemental platinum.
http://www.mwmjewelry.com/platinum_purity.htm
In "950" platinum, 95% of the weight of the net alloy will be platinum mixed with 5 % of another metal - by WEIGHT. Those who are familiar with the "periodic table" remember that each element has it's own specific gravity or mass. This means that some elements are "heavier" than others.
https://www.ganoksin.com/article/platinum-alloy-applications-for-jewelry/
Platinum / Iridium Systems Iridium is one of the PGM’s. It. has a face centered cubic structure and when added to platinum in small quantities it will effect its hardness. The ideal composition for a Pt/lr system has been the 900/100 alloy. It was called Irido-platinum in the 20s and is to this day a …
https://www.specialtymetals.com/blog/2014/7/28/platinum-sterling-what-you-need-to-know-about-this-precious-alloy
Jul 28, 2014 · Beyond the Alloy: Platinum-Plated Silver Jewelry. In the same period of time – about the last decade – a growing number of jewelry manufacturers have also expanded their manufacturing of platinum-plated silver jewelry, especially engagement rings and earrings, in which platinum-plated posts are as tarnish-resistant as pure platinum, yet ...
https://www.leaf.tv/articles/what-are-some-identifying-marks-on-a-platinum-ring/
Platinum Content Marks In most countries where platinum jewelry is manufactured, the pure platinum content is at least 85 percent, according to Platinum Today. Makers commonly alloy platinum with the PGM metals—palladium, ruthenium and iridium. Copper and cobalt are also commonly alloyed with platinum for polishing ability and color.
https://www.gemsociety.org/article/jewelry-metals-overview/
Platinum Jewelry Use. Although platinum use in various objects goes back as far as 700 BCE, its use in jewelry is relatively modern. Since it has an extremely high melting point and resists corrosion so effectively, refining the metal proved difficult for centuries. The oldest recorded use of platinum is as an inlay in Ancient Egypt.
https://www.invaluable.com/blog/guide-to-jewelry-marks/
Apr 06, 2020 · When considering platinum jewelry, the purity mark “950” denotes a composition of 95 percent platinum with a mix of other metal alloys, while “900” is made up of 90 percent platinum, and “850” has 85 percent platinum.
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