Howlite is a stone of patience and perspective, for those who feel they need to slow it down, absorb, and clear the constant stream of chatter from the mind, it's a crystal that marries you to a more mindful way of life.
Amethyst is spiritual healing, calmness, and wisdom. 
Citrine has been referred to as the "success stone," "merchant's stone" or "money stone." Because of its yellow color, citrine is thought of as a joyous stone with sunshiny energy to brighten up the lives of those who work with it and wear it.