Part 2 of Preppin' for Booty makes us purchase a Stone Carver from the Marketplace, chop boulders with our pickaxes to get 6 stones, and make 2 octopus bowls at the Stone Carver. This is a good one to do with part 2 of Beachcombing quest because both request 2 octopus bowls.
Part 3 wants us to buy and build the turquoise mine from the Marketplace. It takes 2 full days to build the mine. Once it is built you can collect 2 turquoise two times from the mine. Make 2 turquoise turtles at the Stone Carver.