What Are Some Identifying Marks on a Platinum Ring?
Fotolia.com”> jQuery(document).ready(function(){ jQuery(‘#jsArticleStep1 span.image a:first’).attr(‘href’,’http://i.ehow.co.uk/images/a06/j9/cs/identifying-marks-platinum-ring_-1.1-800X800.jpg’); }); Platinum rings contain special markings for purity content. Platinum is a heavy, precious metal, gray-white in color and noncorrosive. The platinum group of metals (PGM) are platinum, iridium, palladium, ruthenium, rhodium and osmium. The major platinum jewelry maker and consumer markets today are China, Japan and the United States. Platinum rings and ornaments date more than 2,000 years, and the culture of platinum ring-making over the centuries has led to various traditions in jewelry marking. 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 pla
