Citrine

                  

Citrine is a yellow-to-golden member of the quartz mineral group. It is a premier stone of manifestation, imagination, and personal will. Carrying the power of the sun, it is warm and comforting, energizing and life giving. It stimulates the chakras like the sunlight of spring, clearing the mind and stirring the soul to action.
Citrine has been called the "stone of the mind". Ancient cultures believed that placing a citrine on the forehead of an elder would increase his psychic power.
Natural Citrine does not hold or accumulate negative energy, but rather transmutes, dissipates, and grounds it, making it extremely protective for the environment. It works out problems on both the physical and subtle levels, transforming negative thoughts and feelings into positive ones. It is one of only two crystals on Earth that never needs to be cleared or cleansed.
Citrine is sometimes used by healers to help with digestion as it is considered beneficial to the endocrine and digestive system - cleansing, purifying and eliminating poisons that have built up.