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:
“Women should not weaken their cause by impracticable demands. Make no claim which could not be won in a reasonable time. Take one step at a time, get a good foothold in it and advance carefully.”
—Jane Grey Swisshelm (1815–1884)
“That is coupled to foul thraldom.
But if he had assayed it,
Then all perquer he should it wit;
And should think freedom more to prize
Than all the gold in world that is.”
—John Barbour (1316?–1395)