The term white gold is used very loosely in the fine jewelry industry to describe karat gold alloys with a whitish tinge. The term "white" covers a large spectrum of colors that include pale yellow, pale rose, and tinted brown; the jewelry industry often hides these off-white colors with rhodium plating, a white and reflective metal that provides an excellent protective coating.
White gold is an alloy of gold and at least one white metal, usually silver, copper, manganese, palladium, or nickel. Nickel and palladium act as primary bleaching agents for gold; zinc acts as a secondary bleaching agent to counter-balance the color of copper.
White gold's properties vary depending on the metals and proportions used in the alloy: a nickel alloy is stronger and therefore better for rings and pins, while palladium alloys are softer and better for gemstone settings.
Rose, Red, and Pink
Rose, red, and pink are gold and copper alloys widely used for specialized jewelry. Although the names are often used interchangeably, the difference between rose, pink, red, and pink is the amount of copper in the alloy – the higher the copper content, the more red it will look.
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