This is a spectacular cluster of the rare earth silicate, chevkinite, for this species. Highly lustrous, stout, prismatic faces are offset by lustrous, rough terminations. The crystals reach 4.5 cm across. This came from one "best of species" pocket brought out to market by Herb Obodda back in the early 2000s, and recalibrated the species for quality. In the size range, this would be hard to beat. Ex. Dr. Ed David collection.