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)
“Don different from those regal Dons!
With hearts of gold and lungs of bronze,
Who shout and bang and roar and brawl
The Absolute across the hall,”
—Hilaire Belloc (1870–1953)