123Movies. Share an exciting adventure with Sandy and Crystal as they go searching for "Mica's Magic Gemstone." Along the way to finding their treasure, they meet four very interesting characters: Mica - the tour guide, Sir Sediment - ruler of the sedimentary rocks, Iggy St. Igneous - guardian of the igneous rocks, and Matty Morphic - the metamorphic magician. Our characters use catchy songs to introduce Sandy and Crystal to the three major categories of rocks.