One of the finest Rhodizite specimens I have seen in recent years, due to the fine color, excellent luster, superb gemminess (not at all opaque) and sharpness of the crystal (which measures 2.0 x 1.6 cm). This material is Rhodizite, though unusually RB-rich, and is not the same as Londonite: the relatively Cs-dominant analogue of Rhodizite named after Dr. David London. This specimen was exchanged from Madagascar specialist Dr. Federico Pezzotta. From anybody else, I would have gone ahead and labeled it as Londonite as they tend to be more lustrous and yellow than the pure Rhodizites. 6.2 x 4.6 x 4.3cm