When I was starting out as a teacher this pendant was a wonderful support - black agate for protection and clear “shaman” quartz to amplify my self confidence and bring clarity. 
I’ve since embodied these energies and I feel each time I look at this pendant that there is someone else out there that needs it now. 
It’s a difficult one to let go of but I feel it’s time. The pendant has been filled work healing energies and is ready for its new owner. May you wear it in good health.