What is the chance to get a crate full of coral?

Question

What is the percentage chance of getting the crate full of coral in the 2nd stage of Liquid Black Quest?

Answer 1

According to TibiaFandom:

item	amount	percentage	tries to get 1
You manage to mine enough chunks of coral to fill one crate	121	9,7%	11
It seems you disturbed a Deepling worker.	776	62,18%	2
The coral you mined was crumbly and of minor quality.	351	28,13%	4

soure: https://tibia.fandom.com/wiki/Liquid_Black_Quest

Unfortunately the only source with this kind of information you can find on Wiki, which is created by players and we can not consider it as official info, however amount of tries seems to be high enough to identify helpful statistics.

From my own experience I can say that gatherigh 10 Crates Full of Coral takes about 30-45 minutes.