Mercury governs the intellect and communication. It rules speech, writing, language, education, trade, and commerce.
A good gemstone for Mercury stimulates the mind and calms the nervous system. It puts us in touch with the ability to discriminate, evaluate, and a gemstone for Mercury will facilitate learning. Mercury gemstones are also suitable for writing, speaking, and other forms of creative expression, such as dance and music.
Physically, Mercury governs the skin, lungs, throat, and nose. Gemstones for Mercury can strengthen the lungs and aid the breathing process. They help develop prana and healing energy.