Well, I'm an Indian, and here's the latest on the matter.
Firstly, the value discovered has since escalated to over $20 bil.
Secondly, that amount isn't really too valuable to the government. In fact, members of Parliament are pushing for the treasure to remain as property of the temple.
@Micharus
If they did decide to do something like converting it to money, the international uproar would be significantly less than the uproar within India itself.