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:
“I cannot tell what I am as much afraid of, as a woman who invariably washes on Monday. It is a kind of key to character; and if her mouth is not puckered and her brow wrinkled, they will be, unless she repents.”
—Jane Grey Swisshelm (1815–1884)
“The fifth day of Christmas,
My true love sent to me
Five gold rings,”
—Unknown. The Twelve Days of Christmas (l. 19–21)