There was some datamining back in 2018
that produced this table:
where your chest level determines how many times a value is pulled, and the chest multiplier determines the amount, with “hidden” weights behind each possibility.
There was strong evidence around the 4.7 update at the end of 2019 that the probabilities for the higher gold value was significantly lowered, but as far as I am aware the table of available drops is still accurate.
So, you could get 10x6 shard pulls with a max theoretical multiplier of 5.3x (in Indrajit’s Palace according to Nulling’s analysis here) giving 318 shards. This is outrageously insanely unlikely, but technically possible.