Ronnie Rock's Crystals


To observe how crystals are formed


  • Black construction paper
  • Plastic lid or lid from a large jar
  • Measuring cup
  • Epsom salt
  • Tablespoon
  • Wooden craft stick


Place the circle of black construction paper inside the plastic lid. Fill the measuring cup with one-fourth cup of water and add three tablespoons of Epsom salt to the water. Stir the mixture. Pour a very thin layer of the solution into the lid. Allow it to sit undisturbed for one day.


Crystals form on the black paper. The Epsom sale molecules grow cloer together as the water slowly evaporates. The salt molecules begin to line up in a pattern and form long crystals. The sale molecules stack together and determin the shape of the crystal.