Searching for 100 Iridium 900 Plat Jewelry Mark information? Follow the links below to find all the information you need and more.
https://www.georgianjewelry.com/blog/iridium-platinum-explained
Why combine iridium with platinum? It gives platinum an even harder-wearing durability. Usually jewelry and rings are often 10% iridium and 90% platinum. Hallmarks that you may find are 10 Irid 90 Plat, 100 Irid 900 Plat, 10% Irid 90% Plat, or other …
https://www.tentwothree.com/platinum_jewelry_information.asp
Many estate jewelry hallmarks will be PT900, indicating that the metal is 900 parts per 1000 of pure platinum. The remaining 100 part are usually made with iridium which makes the jewelry harder. 900 Plat - 100Irid - means platinum alloyed with 10% iridium. PT850 - platinum at 85%
https://www.pricescope.com/community/threads/are-there-any-downsides-to-a-900-platinum-100-iridium-mix.158700/
Jan 16, 2013 · Re: Are there any downsides to a 900 Platinum / 100 Iridium My experience with 900 Platinum is that it cracks easier then 950 platinum. Im in the belief that Plat 950 has prevailed over the years as the jewelry standard because the security that it provides.
https://www.wikihow.com/Identify-Quality-in-Platinum-Rings
Jan 09, 2010 · If this other 5% is from the platinum metal group (iridium, palladium, ruthenium, rhodium), the ring can be considered 100% precious. A 900PLAT ring will usually be alloyed with iridium or palladium. Sometimes it will be listed as IRIDPLAT to indicate a …93%(14)
http://www.mwmjewelry.com/platinum_purity.htm
4) 90% platinum (900) - alloyed with 10% iridium "Classic Platinum" - Vickers hardness = 110. Again: Iridium has an atomic weight of 192.217 - pretty close to that of platinum. 10% iridium, by volume, is a touch over the volume of ruthenium required to equal 5% of our platinum.
https://www.liveabout.com/platinum-jewelry-information-2043747
Aug 17, 2017 · Platinum content is usually expressed as the amount of pure platinum the jewelry contains in parts per thousand. Think about it like this: you mix up a huge bucket of fruit tea that contains 1,000 ounces--900 hundred of the ounces are plain tea and 100 are fruit juice. That makes the tea 900 parts per thousand of your mix.
https://orchid.ganoksin.com/t/platinum-ring-stamped-iridplat/28373
The platinum alloy of choice for a long time in the U.S. was Platinum 900/100 Iridium, an alloy containing 900 ppt platinum and 100 ppt Iridium. This alloy was stamped IRIDPLAT. When the platinum stamping regulations were revised, this alloy was then stamped 900Pt or 900PLAT or Pt 900. There is still a large amount of jewelry being
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.everything-wedding-rings.com/iridium-wedding-bands-and-rings.html
Platinum Iridium Ring by: Anonymous The answer that you were given is incorrect!!! There is a web site called ***** that will tell you all you need to know about jewelry stamped 10% IRID PLAT, and yes it is from the era of the 1890's to the 1930's!!!! Scroll down about half way through the page, and it …
https://community.ebay.com/t5/Archive-Fine-Jewelry-Gems/ring-is-stamped-10-Irid-could-it-be-platinum/td-p/1223404
Nov 07, 2008 · Archive Fine Jewelry, Gems, & Precious Stones ... 90% plat and 10% Irid very common before the started using cobolt. I think is was cobolt I would have to look that part up. I vote Platinum. ... Yes, definitely platinum. 10% iridium, or 5% ruthenium or (less commonly) cobalt are the most common alloys of platinum. ...
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