I cannot recommend Rainbow Fluorite Pendants enough if you are studying. They relieve stress, link the heart and mind to improve retention and insight. These double terminated points are powerful despite their size.
They are a pick me up stone so I wear them often on days where I have woken up tired. Fluorite increases our powers of concentration, self-confidence and helps us in decision-making. It encourages being positive and improves balance and coordination, both physically and mentally.
Wear a rainbow fluorite pendant into exams, to the office if tired and into planning sessions.