Anoint two yellow candles with lemon oil and light them. Take a citrine quartz, anoint with lemon oil also, and place in front of the candles so that the candlelight shines on it. Chant the following: 'Charge the stone with candle light To fill my mind with wisdom bright To keep my mind alert and clear So that no bane can interfere With the process of my brain So what I read is knowledge gained For all my life to stay with me This is my will, so mote it be!' Let the candles burn and charge the stone while you study. Keep the stone with you when you need to give papers, take exams or study.