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:
“Each had his past shut in him like the leaves of a book known to him by heart; and his friends could only read the title, James Spalding, or Charles Budgeon, and the passengers going the opposite way could read nothing at all—save “a man with a red moustache,” “a young man in grey smoking a pipe.””
—Virginia Woolf (1882–1941)
“On the breast of her gown, in fine red cloth, surrounded with an elaborate embroidery and fantastic flourishes of gold thread, appeared the letter A.”
—Nathaniel Hawthorne (1804–1864)