Que-Sera Pendulum Que-Sera Pendulum Gorgous stone held together by quartz, but pieced together with plagioclase, sericite, chloritized rock fragments, potassium feldspar, calcite, kaolinite, iron-oxides, magnetite, clinozoisite, and leucozene It comes with a certificate of authenticity and a silver plated chain. The photo shows the typical item you will receive. Que-Sera is a used for bringing the Universal Life Force energy to bear on a complex and difficult problem. Que-Sera is a meditation crystal that should be kept for very special occasions. It is rare and valuable because of it's highly active energies. Small, 0-1.5 inches in length. Approximate weight is 12 grams.