The dominant yellow ray of this calcite works to clear accumulated self-doubt, giving you the ooportunity for a clean emotuional slate. It is optimal as a mind stoneas it heightens mental discernment and analysis, increases memory capacity as well as the ability to learn quickly and efficiently – its great to have on your desk or better right on your body during revision/tests/exams. calcite is by far the best stone for anyone studying, combined with fluorite! Physically, yellow calcite assists with hormonal imbalances, painful muscles and detoxification of the kidneys. It is a stone of healing and balance. Great ally to align the solar plexus chakra- your will – with your mind.