Crystals

The exact definition for Crystals is a solid material whose constituent atoms, molecules, or ions are arranged in an orderly repeating pattern extending in all three spatial dimensions. (wikipedia) The word Crystal comes from an ancient greek word "krustallos" which is known to have the same meaning. Crystals can have nice shapes and can be worth alot. Many of them are found in Nature. Diamonds. Snowflakes, and table salt are examples of Crystals. Many Crystals look Very Nice.