The Journal of VolumeGemmolol 26 No. 5 January 1999 y The Gemmological Association and Gem Testing Laboratory of Great Britain Gemmological Association and Gem Testing Laboratory of Great Britain 27 Greville Street, London EClN 8TN Tel: 01714043334 Fax: 0171 4048843 e-mail:
[email protected] Website: www.gagtl.ac.uk/ gagtl President: Professor RA Howie Vice-Presidents: E.M. Bruton, AE. Farn, D.G. Kent, RK. Mitchell Honorary Fellows: RA Howie, RT. Liddicoat Jnr, K. Nassau Honorary Life Members: D.J. Callaghan, E.A Jobbins, H. Tillander Council of Management: C.R Cavey, T.J. Davidson, N.W. Deeks, RR Harding, M.J. O'Donoghue, I. Thomson, Y.P. Watson Members' Council: AJ. Allnutt, P. Dwyer-Hickey, S.A Everitt, R Fuller, A.G. Good, J. Greatwood, B. Jackson, J. Kessler, J. Monnickendam, L. Music, J.B. Nelson, P.G. Read, R Shepherd, P.J. Wates, C.H. Winter Branch Chairmen: Midlands - G.M. Green, North West -I. Knight, Scottish - B. Jackson Examiners: AJ. Allnutt, M.5c., Ph.D., FGA, L. Bartlett, B.5c., M.Phil., FGA, DGA, E.M. Bruton, FGA, DGA, C.R Cavey, FGA, S. Coelho, B.5c., FGA, DGA, Prof. AT. Collins, B.5c., Ph.D, AG. Good, FGA, DGA, G.M. Howe, FGA, DGA, G.H. Jones, B.5c., Ph.D., FGA, M. Newton, B.5c., D.Phil., CJ.E. Oldershaw, B.5c. (Hons), FGA, B.L. Plumb, B.5c., FGA, DGA, RD. Ross, B.5c., FGA, DGA, P.A Sadler, B.5c., FGA, DGA, E. Stern, FGA, DGA, S.M. Stocklmayer, B.Sc. (Hons), FGA, Prof.