Your earlier estimation was correct. Three of the larger urns are filled with water, flowers and silver coins, respectively. This is somewhat unusual for an Indian tomb, especially one of this age, but not much of this expedition makes a great deal of sense.
Looking in the smaller pots you find, in this order: some mould, some more mould, a bundle of folded white cloth, a small gold ingot, a talisman in the image of Vishnu, even more mould, some mould with a small bird bone in the middle, three engraved diamonds, and a mouse skull, though no sign of the rest of the mouse.
Deciding to leave these items until after investigating the tomb, you step towards it.