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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 variations. …
https://www.etsy.com/market/iridium_platinum
Solid 900 Platinum 10% Iridium Diamond Antique Wedding Band Knife Edge Stackable Half Carat 0.70pts Diamonds Stacking Large Size 9.25 Unisex. SuiGenerisJewels. From shop SuiGenerisJewels. 5 out of 5 stars. (208) 208 reviews. $740.00 FREE shipping. Only 1 available and it's in 1 …
https://www.etsy.com/market/iridium_ring
Add to Favorites. Stunning. 90 Percent Platinum and 10 Percent Iridium Vintage Diamond Ring. Wedding Ring, Engagement, Anniversary Ring, All Purpose Ring. LisaJJewelers. 5 out of 5 stars. (103) $1,800.00 FREE shipping. Add to Favorites.
https://orchid.ganoksin.com/t/platinum-ring-stamped-iridplat/28373
platinum. If the piece is at least 75% platinum and the rest of the make-up is of platinum group metals (irridium, palladium,ruthenium, rhodium, or osmium) then the piece can be stamped platinum, but must be preceded by the abbreviation for the other predominant metal (in this case irridium or IRID). I also have a ring stamped in this way,Estimated Reading Time: 2 mins
https://www.everything-wedding-rings.com/iridium-wedding-bands-and-rings.html
10% Iridium Platinum Shank by: Anonymous I just recently purchased a ring that says 10% irid plat in the shank! Can you tell me a little bit about it? Hello. Platinum by itself is too soft for jewelery, and so it is alloyed with other types of metals such as iridium, ruthenium or even cobalt.
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."Estimated Reading Time: 3 mins
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. Pt also the chemical symbol - mark for platinum.
https://www.consumer.ftc.gov/articles/platinum-gold-and-silver-jewelry
The metals used in platinum jewelry usually fall into one of three categories: other platinum group metals (palladium, ruthenium, rhodium, iridium, osmium) Marketers describe or mark platinum to show the percentage of pure platinum in the piece. To be called platinum, an item should be at least 50% pure platinum.
https://community.ebay.com/t5/Archive-Fine-Jewelry-Gems/ring-is-stamped-10-Irid-could-it-be-platinum/td-p/1223404
Nov 08, 2008 · 11-08-2008 12:53 PM. Yes, definitely platinum. 10% iridium, or 5% ruthenium or (less commonly) cobalt are the most common alloys of platinum. So your ring is 90% platinum.Estimated Reading Time: 50 secs
https://community.ebay.com/t5/Archive-Fine-Jewelry-Gems/Antique-Platinum-ring-marked-RD-PLAT-Real-Hallmark/td-p/2955866
Nov 19, 2012 · What you are seeing is "irid" 'plat", thats an older stamp for platinum jewelry,but the full stamp of ''Irid" has probably worn off. It means 90 % platinum, and 10 % Iridum, a low tarnishing metal that platinum is mixed with...nowadays, platinum jewelry is 95% platinum, and 5 % Iridium,and the stamp is usually "PT' for Platinum and 'Irid".Thats a beautiful ring,bids will probably go thru the roof.
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