October 20 rates in rupees with previous rates in bracketsChennaiBar Silver (1 kg) 18,440 (17,980)Retail (1 g) 19.75 (19.25)24 ct gold (10 g) 8,970 (8,800)22 ct gold (1 g) 831 (815)MumbaiSilver 18,722 (18,472)Standard gold 8,842 (8,746)DelhiSilver (.999) 18,425 (18,300)Standard gold 8,990 (8,850)Sovereign 7,550 (7,500)