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2. Costco is now selling platinum bars. Here's the price of a bar.

   www.aol.com/costco-now-selling-platinum-bars...

   Platinum's current spot price is $1,004 an ounce, according to financial services company FactSet, which means that Costco's price is about 8% higher than the market value. Michigan voters share ...

3. Costco Platinum Bars: How $1,089 Price Tag Compares To Gold

   www.aol.com/finance/costco-platinum-bars-1-089...

   In 2023, the retail juggernaut debuted gold bars that sold out almost instantly, leading Costco to introduce 1-ounce platinum bars for a price of $1,089 made of 999.5 pure platinum.

4. Johnson Matthey Technology Review - Wikipedia

   en.wikipedia.org/wiki/Johnson_Matthey_Technology...

   Johnson Matthey Technology Review, known as Platinum Metals Review before 2014, is a quarterly, open access, peer-reviewed scientific journal publishing reports on scientific research on the platinum group metals and related industrial developments. [1]

5. Platinum–iridium alloy - Wikipedia

   en.wikipedia.org/wiki/Platinum–iridium_alloy

   Platinum–iridium alloys are alloys of the platinum group precious metals platinum and iridium. Typical alloy proportions are 90:10 or 70:30 (Pt:Ir). These have the chemical stability of platinum, but increased hardness. The Vickers hardness of pure platinum is 56 HV while platinum with 50% of iridium can reach over 500 HV.

6. Fineness - Wikipedia

   en.wikipedia.org/wiki/Fineness

   24-karat gold is pure (while 100% purity is very difficult to attain, 24-karat as a designation is permitted in commerce for a minimum of 99.95% purity), 18-karat gold is 18 parts gold, 6 parts another metal (forming an alloy with 75% gold), 12-karat gold is 12 parts gold (12 parts another metal), and so forth. [20]

7. Platinum Hits Costco Shelves: Why The Retail Giant Is ... - AOL

   www.aol.com/platinum-hits-costco-shelves-why...

   The retail giant now offers 1-ounce platinum bars for $1,089.99 exclusively to members via its website. This move is part of Costco's broader strategy to diversify its product lineup and ...

8. Proton-exchange membrane fuel cell - Wikipedia

   en.wikipedia.org/wiki/Proton-exchange_membrane...

   Even tens of parts per million of CO can poison a pure platinum catalyst, so increasing platinum's resistance to CO is an active area of research. For example, one study reported that cube-shaped platinum nanoparticles with (100) facets displayed a fourfold increase in oxygen reduction activity compared to randomly faceted platinum ...

9. Platinum (color) - Wikipedia

   en.wikipedia.org/wiki/Platinum_(color)

   Platinum is a color that is the metallic tint of pale grayish-white resembling the metal platinum. ... 1,000 cubic centimeters (one liter) of 99.9% pure platinum ...