What do I do with the birthstones?

Hint 1 of 4:

Look for the altar. It has a dish on top of it.

Hint 2 of 4:

Putting the correct stones in the correct order will activate
the gems on the front of the altar.

Hint 3 of 4:

If the stone burns up, it is not the correct stone.

Hint 4 of 4:

Try the Sunstone, Diamond, Opal and Ruby.