Grey gold alloys are made by adding silver, manganese and copper in specific ratios to the gold.
Read more about this topic: Red Gold
Famous quotes containing the words grey and/or gold:
“We have not the slightest idea that women are made of such light material that the breath of any fool or knave may blow them on the rocks of ruin.”
—Jane Grey Swisshelm (1815–1884)
“The intelligent have a right over the ignorant, namely, the right of instructing them. The right punishment of one out of tune, is to make him play in tune; the fine which the good, refusing to govern, ought to pay, is, to be governed by a worse man; that his guards shall not handle gold and silver, but shall be instructed that there is gold and silver in their souls, which will make men willing to give them every thing which they need.”
—Ralph Waldo Emerson (1803–1882)