Orthoclase from selected localities.
UK | |
| Spalding, A., Hartgroves, S., Macadam, J., and Owens, D. (1999): The conservation value of abandoned pits and quarries in Cornwall, Report of the Derelict Land Advisory Group Conference, Truro, March 22, 1999. Cornwall County Council, 105 pp. |
Russell, A. (1910) Mineralogical Magazine 15, 377-384; Bowman, H.L. (1911) On the occurrence of bertrandite at the Cheesewring Quarry, near Liskeard, Cornwall. Mineralogical Magazine, Vol. 16, pg. 47-50.; Spalding, A., Hartgroves, S., Macadam, J., and Owens, D. (1999) The conservation value of abandoned pits and quarries in Cornwall, Report of the Derelict Land Advisory Group Conference, Truro, March 22, 1999. Cornwall County Council, 105 pp. | |
| Spalding, A., Hartgroves, S., Macadam, J., and Owens, D. (1999): The conservation value of abandoned pits and quarries in Cornwall, Report of the Derelict Land Advisory Group Conference, Truro, March 22, 1999. Cornwall County Council, 105 pp. |
Spalding, A., Hartgroves, S., Macadam, J., and Owens, D. (1999): The conservation value of abandoned pits and quarries in Cornwall, Report of the Derelict Land Advisory Group Conference, Truro, March 22, 1999. Cornwall County Council, 105 pp. | |
| BMS Database; UK Journal of Mines and Minerals, No. 14 p32 |