Gold Refining and Parting
Gold parting is primarily the removing of silver from gold and therefore increasing the purity of gold. The parting of gold from silver has been done since ancient times starting in Lydia in the 6th century BC. Various techniques have been practised; salt cementation from ancient times, parting using distilled mineral acids from medieval times, and in modern times using chlorination using the Miller process and electrolysis using the Wohlwill process.
Read more about this topic: Gold Extraction
Famous quotes containing the words gold, refining and/or parting:
“Whatever is gold does not glitter. A gentle radiance belongs to the noblest metal.”
—Friedrich Nietzsche (1844–1900)
“Artistic growth is, more than it is anything else, a refining of the sense of truthfulness. The stupid believe that to be truthful is easy; only the artist, the great artist, knows how difficult it is.”
—Willa Cather (1876–1947)
“I can hear, underground, that sucking and sobbing,
In my veins, in my bones I feel it,—
The small waters seeping upward,
The tight grains parting at last.”
—Theodore Roethke (1908–1963)