From the BBC:
"Precious stones, gold and silver are among valuables found at Sree Padmanabhaswamy temple.
The riches are thought to have been languishing in the temple vaults for more than a century, interred by the Maharajahs of Travancore over time.
They have not been officially valued and inspectors are taking an inventory.
Inspectors say they will continue cataloguing the treasure for at least one more week.
Unofficial estimates say that the treasure discovered so far over four days of inspections may be valued at more than 25 billion rupees ($500m). But historians say that assessing the true value of these objects is likely to be extremely difficult. "
Link: http://www.bbc.co.uk/news/world-south-asia-13994351
Update: Value of treasure now estimated at 22 billion dollars