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What is platinum made of - Watches

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Are you sure you want to know...lol.

Here is the Platinum composition based on jewelry.

It is composed of six basic elements- ruthenium, rhodium, iridium, osmium, palladium and platinum- and these all have the silvery, almost white quality of the final product. Platinum alloys are made from mixing platinum, palladium, iridium and ruthenium with either copper or cobalt. Most platinum jewelry also contains small amounts of the rarer and more expensive iridium or ruthenium for added strength. The finest platinum jewelry is mixed with 10% of these elements. Platinum “fineness” [the relative amount of platinum in the piece] is marked on the jewelry, though markings vary from one country to another. In the U.S, general guidelines were set to minimize the potential confusion; with only 950 unit/part [23.5K] platinum marked as pure platinum. Thus anything simply marked “plat” on the back of the piece, without any specific indicators of exact measurement, is atleast 950 units of pure material out of 1000 units. Pieces that have 850 to 950 parts platinum are marked ‘850 Plat' [or abbreviated to 850 Pt]. Pieces with less than 500 parts- less than 50%- pure material cannot be marked ‘plat'. This is illegal in the States and Europe . In many European countries the minimum platinum requirement is even harsher than in the States and only 950 unit pieces are considered real platinum. On occasion, you can find 85% platinum [850 units] and this will be marked Pt 850.

Posted on Sep 01, 2010

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