What i always found funny is Anet's ''Fetish'' with Jade, i mean its everywhere in the GW's World, in Crystal Desert Jade scarabs for starters, and go figure ;)
What i do find funny, is this, the Lighthouse has a piece of Jade that sends the light's rays out right? How did they manage to get that piece of Jade BEFORE the Jade wind? Cause i dont see why they would swap another piece in place when no ships are sailing anymore :P
P.S My only slight thought is that they may have swapped it indeed due to them ''Fish'' ships from the Luxons, they say they slide/sail over the jade sea.