As selenite can clear any negative energies it is the perfect crystal to position at your front door, or entrance to your apartment. In this way you can literally leave all the negativity or blocked energy you have experienced throughout the day at the door. I frequently wand myself with selenite as I come in the door.  Satin spar is a form of gypsum and like selenite it can clear energies to have your crystals perform at the optimum levels. This is a great idea to store your crystals and keep tumbles or other small ones ready for your use. 
 
4" x 2 x 0.75"
wt. 0.3 lbs