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A platinum credit card has a higher credit limit and a lower interest rate than a regular credit card; it is only available to someone with a good credit rating.
A married couple's 70th wedding anniversary is called their platinum anniversary. The 70th anniversary of any important event can be referred to as a platinum jubilee, although this term is seldom used.
a platinum album is an album whose sales figures have reached a certain amount. This threshold differs from market to market—in the United States, a platinum album is one that has sold at least 1,000,000 copies.
References
The color displayed in the color box above matches the color called platinum in the 1930 book by Maerz and Paul A Dictionary of Color New York:1930 McGraw-Hill; the color platinum is displayed on page 113, Plate 45, Color Sample A3.
Maerz and Paul A Dictionary of Color New York:1930 McGraw-Hill Page 202; Color Sample of Platinum: Page 113 Plate 45 Color Sample A3