Searching for Platinum Jewelry Numbering System information? Follow the links below to find all the information you need and more.
https://www.wikihow.com/Identify-Platinum-and-Silver-Jewelry
Feb 24, 2011 · Platinum is a very rare and expensive metal. Therefore, all platinum jewelry will be marked to show authenticity. Look for the words “Platinum," “PLAT," or “PT” followed or preceded by the numbers “950” or “999." …85%(55)
https://www.consumer.ftc.gov/articles/0294-platinum-jewelry
600 Pt. 350 Ir. = 60% pure platinum, 35% iridium; Platinum jewelry with 15% to 50% base metals also may be labeled "platinum.” These platinum/base metal alloys contain from 50 to 85% pure platinum, but the total of pure platinum and other platinum group metals is less than 95%. Labels for this jewelry should include the amounts of pure platinum and other metals in the piece using the full name of each metal …
https://www.leaf.tv/articles/what-are-some-identifying-marks-on-a-platinum-ring/
Rings containing 850 or more parts pure platinum may be described as "platinum" if they use the number "850," or "85% or more" to qualify "Platinum" or its abbreviation in the content marking. Abbreviation marks for other PGMs include: "Plat." or "Pt." for platinum; "Irid." or "Ir." for iridium; "Pall." or "Pd." for palladium; "Ruth." or "Ru."
https://www.wikihow.com/Identify-Quality-in-Platinum-Rings
Jan 09, 2010 · If letters are given, they will say either PT, PLAT, or PLATINUM, which indicates that the ring is at least 95% platinum. In the U.S., the number given before or after these letters can be 850, 900, or 950. This indicates that the ring is made with 85%, 90%, or 95% pure platinum, respectively.93%(14)
https://www.dmia.net/diamonds-serial-numbers-3-reasons-want-one/
Sep 19, 2016 · Just What Diamonds Have Serial Numbers? Not all diamonds have serial numbers. In the US, only diamonds that have been graded by the Gemological Institute of America (GIA) carry an engraved serial number. The serial number is engraved into the diamond as part of the certification process, and matches the number on the diamond’s certificate.
https://www.leaf.tv/articles/how-to-identify-gold-jewelry-by-number-marks/
Look for markings like "PT" or "PT" followed by a number to indicate platinum metal. You may also be looking at palladium jewelry, which has marks like "PD," "PALL" or "Palladium." Carry a loupe and magnifier when you shop.
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