Grey gold alloys are made by adding silver, manganese and copper in specific ratios to the gold.
Read more about this topic: Colored Gold
Famous quotes containing the words grey and/or gold:
“As our boys and men are all expecting to be Presidents, so our girls and women must all hold themselves in readiness to preside in the White House; and in no city in the world can honest industry be more at a discount than in this capital of the government of the people.”
—Jane Grey Swisshelm (1815–1884)
“I am a lantern—
My head a moon
Of Japanese paper, my gold beaten skin
Infinitely delicate and infinitely expensive.”
—Sylvia Plath (1932–1963)