TM10X4: Single crystal, very big for the species, that shows very well marked parallel and laminar polycrystalline growths, with a good termination, an excellent violet-blue color and on a matrix of small laminar hexagonal Graphite crystals. It is partially coated by very small unidentified crystals that fluoresce orange under the UV light. A piece for the collector, not for faceting but very interesting as a mineral sample.
D-Block Mine, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region  Tanzania (2012)

Specimen size: 11.7 × 6.2 × 2.7 cm = 4.61” × 2.44” × 1.06”