See this link:

http://www.cbec.gov.in/travellers.htm

"An Indian passenger who has been residing abroad for over one year is allowed to bring jewellery, free of duty in his bonafide baggage upto an aggregate value of Rs. 10,000/- (in the case of a male passenger) or Rs.20,000/- (in the case of a lady passenger."

For your kind information, custon duty / rules remain same on every airport of India.