Rescue Yvette from her crystal prison. It takes level 9 and 2000 gold to get to her.
Once Yvette is free, we can get opals from her house (12 gold and 4 hrs for 2 opals). We can then make an opal-studded cup at the Woodshop for 1 opal, 2 logs, and 5 minutes time.
Part two is about making oatberry bars (level 10, 2 oat, 2 blueberry, 2 min) from the Trail Kitchen. First we must buy a blueberry patch from the Marketplace. It takes 8 hours to build, but you get 5 blueberries once it's done building.
Go to the Well of Wishes and send in Rafael so that he can receive the Spell of Bright Light needed for this quest. While at the Well you have a chance of getting stardust which will complete the third task.