Green Onyx is a powerful protection stone.  It can transmute negative energy and aids in the development of emotional and physical strength.  Onyx can be used to encourage happiness and good fortune.  This stone helps one to become the master of their own fate.  

Green Amethyst or Prasiolite carries the same energies as Purple Amethyst with some added bonuses.  This stone stabilizes the heart chakra.  It inspires creativity and attracts success, prosperity and abundance.  Green Amethyst is particularly useful to those who have poor self-image enabling them to see and appreciate their own value.