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UK | |
| Mason, Anita (1976) The World of Rocks and Minerals. Larousse & Co., Inc., New York. |
| Alysson Rowan collection |
| Day, Harry (1999) BMS Database, British Micromount Society. Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York. |
High Down Quarry, West Buckland, North Devon, Devon, England, UK