u go to the spaceship place u have to earn that first though then mine near the fishing spot =]
to get the rocket essences go to rocket reef and shake trees that have rocket essences.
it is at the place where you first start, in the pink picnic table. that is where i found it. there could be more answers, but hope i helped for that!
you get it on the royal academy island
Well,there are a lot of ways you can get silver essences.You can get them about anywhere.One place you can get them is if you mine in Cowboy Junction and there are a lot more places but this is...