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USA | |
| Cook, Robert B. (2008) Connoisseur's Choice: Kyanite Minas Gerais, Brazil. Rocks & Minerals, 83 (6) 520-527 doi:10.3200/rmin.83.6.520-527 |
| [var. Sapphire] Januzzi, Ronald. E. (1994) Mineral Data Book - Western Connecticut and Environs. Mineralogical Press, Danbury, Connecticut, USA. Former Ronald Januzzi collection |
| Shepard Collection |
| Emerson, B. K. (1902), Note on Corundum and a Graphitic Essonite, from Barkhamsted, Connecticut. American Journal of Science: s. 4, 14: 234-6. |
| Hitchcock, Edward. (1823), A Sketch of the Geology, Mineralogy and Scenery of the Region Contiguous to the River Connecticut. American Journal of Science: s.1, 6: 1-86, 203-36, 7: 1-30. Robinson, Samuel. (1825), A Catalogue of American Minerals, With Their Localities Cleaveland, Parker (1822) An Elementary Treatise on Mineralogy and Geology (2nd ed.) Cummings and Hilliard, Boston. Including All Which Are Known to Exist in the United States and British Provinces, And Having the Towns, Counties, and Districts in Each State and Province Arranged Alphabetically. With an Appendix, Containing Additional Localities and a Tabular View. Cummings, Hilliard, & Co., Boston. |
| Harvard Mineralogical Museum specimen |
| Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p.23 |
| Januzzi, Ronald. E. (1994) Mineral Data Book - Western Connecticut and Environs. Mineralogical Press, Danbury, Connecticut, USA. Januzzi, Ron E., Seaman, David M. (1976) Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut, USA. |
| Januzzi, Ron E., Seaman, David M. (1976) Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut, USA. Januzzi, Ronald (1959) The Minerals of Western Connecticut and Southeastern New York State.. The Mineralogical Press, Danbury, Connecticut. |
| Januzzi, Ron E., Seaman, David M. (1976) Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut, USA. |
| Shepard, Charles U. (1837): REPORT ON THE GEOLOGICAL SURVEY OF CONNECTICUT. |
| Rocks & Minerals. Vol. 70. No. 6 |