I would like to introduce you to these three amazing sisters. They put me in mind of the three Fates from Greek Mythology: Past, Present and Future.
Elestial Quartz is an especially amazing stone to work with if you are into working with the Angels and angelic realm. It helps with clarity if you are and Integrated Energy Therapy (IET) practitioner or someone who uses divination cards in your work, as they help you to receive the guidance you are looking for.
Not to mention the geometry from these amazing stones assists in mathematics, geometry, electronic configurations, and mathematical equations. I'm thinking, school work, anyone else?