In real life, liquid mercury forms an amalgam with gold, which forms a mixed liquid. In TPT, gold and mercury have zero interaction which is unrealistic. Here's how it could work in TPT

If a pixel of MERC comes into contact with a pixel of GOLD, the GOLD pixel disappears and the MERC pixel gets a value that indicates gold is mixed in with it.

When heated, MERC pixels that contain gold turn into GOLD, this simulates gold extraction, which is done in real life by evaporating mercury and leaving behind gold.

If there's still pure MERC pixels that touch the precipitated gold, it repeats the cycle until there is either no MERC left, or the temperature has cooled down below its boiling point.

This would make the game not only more interesting, but more realistic, imagine all the cool GOLD refineries, even if you don't care about the science or realism, it would add a lot of function to the game, not just be empty filler,

@velsuki (View Post)

 Ok but mercury is used to dissolve the gold in that rock, and then it's drained and evaporated, current factories only form the gold, but can't really extract it from the rock.