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2. Platinum print - Wikipedia

   en.wikipedia.org/wiki/Platinum_print

   The ferrous oxalate then reacts with platinum(II) or palladium(II) reducing it to elemental platinum (or palladium), which builds up the image. By varying the amount of platinum versus palladium and the addition of oxidizing chemicals such as hydrogen peroxide and potassium dichromate or potassium chlorate , the contrast and "color" of the ...

3. Noble metal - Wikipedia

   en.wikipedia.org/wiki/Noble_metal

   While lists of noble metals can differ, they tend to cluster around gold and the six platinum group metals: ruthenium, rhodium, palladium, osmium, iridium, and platinum. In addition to this term's function as a compound noun, there are circumstances where noble is used as an adjective for the noun metal.

4. Precious metal - Wikipedia

   en.wikipedia.org/wiki/Precious_metal

   Other precious metals include the platinum group metals: ruthenium, rhodium, palladium, osmium, iridium, and platinum, of which platinum is the most widely traded. [1] The demand for precious metals is driven not only by their practical use but also by their role as investments and a store of value. Historically, precious metals have commanded ...

5. Platinum group - Wikipedia

   en.wikipedia.org/wiki/Platinum_group

   Naturally occurring platinum and platinum-rich alloys were known by pre-Columbian Americans for many years. [5] However, even though the metal was used by pre-Columbian peoples, the first European reference to platinum appears in 1557 in the writings of the Italian humanist Julius Caesar Scaliger (1484–1558) as a description of a mysterious metal found in Central American mines between ...

6. Palladium - Wikipedia

   en.wikipedia.org/wiki/Palladium

   Palladium has been used as a precious metal in jewelry since 1939 as an alternative to platinum in the alloys called "white gold", where the naturally white color of palladium does not require rhodium plating. Palladium, being much less dense than platinum, is similar to gold in that it can be beaten into leaf as thin as 100 nm (1 ⁄ 250,000 ...

7. Platinum as an investment - Wikipedia

   en.wikipedia.org/wiki/Platinum_as_an_investment

   Platinum is traded in the spot market with the code "XPT". When settled in United States dollars, the code is "XPTUSD". As the cost of platinum per ounce fell, the cost per ounce for other metals in the platinum group - especially palladium - rose strongly. As of November 2022, palladium sits at around US$1900 per ounce, compared to US$980 for ...