Sharp, equant, box-filling 2.5 x 2.1 x 1.0 cm translucent dark red-brown tabular crystal of this rare species, seldom seen in such quality except for a few finds from Tanzania. From Don Olson in Tucson in February 2013; who got it from a recent find brought in by Simon Harrison. Photo by Jeff Scovil. Photos of this specimen can be found in: Bruce Cairncross, Minerals & Gemstones of East Africa (2019), p. 118 (a recent and important book on the subject). Also Featured in the book, Refined Elegance (Mineralogical Record, Nov. 2022) on page 92.