I'm trying to upgrade my pickaxe so I can mine the jewels for the wedding bands. I'm having trouble finding the crystals I need to do it the first go around. Are they the flower crystals from the Spire of Courage? Are they just the random jewels I can get from the jeweler in Thremton? I've tried looking through this forum but I'm not understanding most of what is being said, I'm so sorry. 

They are the normal "Crystal" items, not the flower crystal from the raid dungeon. You can mine them in the dungeon below the church, from other dungeons, or from shops in Orchel or Rakake.