THIRUVANANTHAPURAM (AFP) - A treasure trove of gold and silver jewellery, coins and precious stones said to be worth billions of dollars has been found in a Hindu temple in southern India, officials said on Saturday. The valuables have an estimated preliminary worth of over 500 billion rupees, said Kerala Chief Secretary K. Jayakumar, catapulting the temple into the league of India's richest temples. The thousands of necklaces, coins and precious stones have been kept in at least five underground vaults at the Sree Padmanabhaswamy Temple.