- Thumbnail, 2.2 x 1.6 x 1.6 cm
- #1 Orebody, Benallt Mine, Llanfaelrhys, Gwynedd, Wales, United Kingdom (TYPE LOCALITY)
- Ex. American Museum of Natural History
A significant and rare micro of this barium aluminum silicate, from the type locality for the species. This specimen is from the American Museum. It was given to them by the British Museum and the AMNH label states on the reverse side: "Part of BM 1944, 48" which we take to indicate that this was part of the BM-studied type material (in residence at that time at the BMNH before publication in 1949) .