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:
“They plough, harrow, reap, dig, make hay, rake, bind grain, thresh, chop wood, milk, churn, do anything that is hard work, physical labor, and who says anything against it?”
—Jane Grey Swisshelm (1815–1884)
“Then leaf subsides to leaf.
So Eden sank to grief,
So dawn goes down to day.
Nothing gold can stay.”
—Robert Frost (1874–1963)