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https://www.georgianjewelry.com/blog/iridium-platinum-explained
As with most metals for jewelry, they are often combined with other metals to help the metalsmith or jeweler accomplish their feats of wonder. Termed an alloy, it is simply two or more metals brought together. Often another white precious metal known as iridium is combined with platinum. It is exceedingly rare and hard, and has a high melting point.
https://www.americanelements.com/irmwb.html
The World's Only Luxury Iridium Jewelry. The Most Beautiful Precious Metal . the patina of platinum the luster of gold The Strongest Precious Metal Found in Nature. A Melting Point exceeding 4,000 °F Harder & Denser than Gold, Platinum or Silver The Newest Precious Metal In Fine Jewelry.
https://www.etsy.com/market/iridium_jewelry
Iridium jewelry (227 Results) Jewelry, handbags, and accessories Shop this gift guide Women's fashion ... Vintage .10 Iridium .90 Platinum Round European Cut Diamond Single Cut Diamond Ring Size 8 HouseOfHalosJewelry 5 out of 5 stars (20) $ ...
https://www.hcrosscompany.com/precious-metals-and-alloys/platinum-iridium/
The alloy 90/10 plat iridium, containing 10 per cent iridium, has very good all round manufacturing characteristics: it can be cast, welded, machined and stamped; it is ductile and malleable; can be hardened through working; and does not readily oxidize. Because of these advantages 90/10 Plat Iridium has traditionally been one of the most important jewelry alloys used in the USA, although there has recently been a swing toward alloys of 95/5 Plat Iridium.
https://www.everything-wedding-rings.com/iridium-wedding-bands-and-rings.html
Because of its rarity, iridium has only been used in jewelry making as a small part of platinum/iridium alloys until now. The pros of iridium wedding rings? These unique rings are made from an extremely rare metal and they will probably only increase in value with time; while iridium is extremely rare, iridium wedding rings are somewhat affordable with a price range of between approximate $1200 - $4000.
https://jewelryinformer.com/platinum/platinum-group-metals/
Iridium is more well-known for its use in platinum jewelry. Platinum-iridium alloys contain mostly platinum, and between 5% and 10% iridium. The iridium content hardens the platinum, making it less likely to dent or scratch, but the amount is low enough for the alloy to remain malleable.
https://www.consumer.ftc.gov/articles/platinum-gold-and-silver-jewelry
The metals used in platinum jewelry usually fall into one of three categories: pure platinum; other platinum group metals (palladium, ruthenium, rhodium, iridium, osmium) base metals (copper or cobalt, for example) Marketers describe or mark platinum to show the percentage of pure platinum in the piece.
https://www.mgsrefining.com/blog/2015/10/01/ruthenium-vs-iridium-in-platinum-alloys/
Oct 01, 2015 · The most common casting grain we sell is 95% platinum alloyed with 5% ruthenium. Generally, 950 platinum-iridium alloy is soft and malleable. This makes it easy to work with, but it’s vulnerable to dents, scratches, and deformation. So while it’s great for hand fabrication and small pieces of jewelry, it doesn’t hold up well over time.
https://www.liveabout.com/platinum-jewelry-information-2043747
Aug 17, 2017 · Jewelry that contains at least 950 parts per thousand of platinum group metals, with at least 500 parts per thousand of the total pure platinum, may be marked as platinum as long as the numbers of each metal are disclosed. For instance, "600 Pt. 350 Ir." or 600 Plat. 350 Irid." for 600 parts pure platinum and 350 parts iridium "550Pt. 350Pd. 50Ir."
https://en.wikipedia.org/wiki/Platinum-iridium_alloy
The Vickers hardness of pure platinum is 56 HV while platinum with 50% of iridium can reach over 500 HV. This improved hardness has also been considered as beneficial for use in platinum jewellery, particularly watch cases. Owing to their high cost, these alloys are rarely used.
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