Red Gold - Grey Gold

Grey gold alloys are made by adding silver, manganese and copper in specific ratios to the gold.

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Famous quotes containing the words grey and/or gold:

    “Old, aching God, grey with endless care,
    calmly piercing evil’s new disguises,
    glad of good surprises, wiser than despair
    Hail and Hosanna, old, aching God!”
    —Brian Wren (b. 1936)

    “We are educated in the grossest ignorance, and no art omitted to stifle our natural reason; if some few get above their nurses’ instructions, our knowledge must rest concealed and be as useless to the world as gold in the mine.”
    —Mary Wortley, Lady Montagu (1689–1762)