Bixbite (Pezzottaite)

"Pezzottaite, exchanged under the name raspberry beryl or raspberyl , is a mineral variety first approved by the International Mineralogical Association in year September 2003. Pezzottaite is a cesium analog of beryl, a silicate of cesium, beryllium, lithium, and aluminum, with the chemical equation Cs(Be2Li)Al2Si6O18. Named after Italian geologist and mineralogist Federico Pezzotta, pezzottaite was initial thought to be either red beryl or a new variety of beryl (""caesium beryl""); unlike genuine beryl, however, pezzottaite contains lithium and crystallizes in the trigonal crystal system preferably than the hexagonal regularity.