Crystal Shells... - In a pot, dissolve 9 tbsp of Borax in 3 cups of boiling water. Stir until your solution is crystal clear. Place a handful of shells and a flat container. They should not touch each other. Pour the solution over the shells and leave it in a safe place out of direct sunlight to cool. The crystal will begin to form after a few hours but let is be for 24 hours. Gently drain and lay out to dry.