Over 2,600 years ago, the Lydian king Croesus not only controlled the gold-particle-filled Pactolus River, but also mined silver to make electrum, making him the richest man in the world; hence the idiom "as rich as Croesus."
兩千六百多年前，里底亞國王克洛伊索斯不但領有盛產金沙的帕克托羅斯河，又開採出含銀的「琥珀金」（白色黃金），因而富甲天下，西諺至今還有「像克洛伊索斯一樣富有」（As rich as Croesus）的說法。