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:
“Smile and feel ten years younger; worry and get grey hair.”
—Chinese proverb.
“As I have known them passionate and fine,
The gold for which they leave the golden line
Of lyric is a golden light divine,
Never the gold of darkness from a mine.”
—Robert Frost (1874–1963)