t ThThe JournaJournaJournalll ooff ,••, emmoemmoemmoj Volume 28 No. 8 October 2003 «,-- .'-:S«fe* The Gemmolog Testini g Laboratoriation and Gem Testing Laboratory of Great Britain Gemmological Association and Gem Testing Laboratory of Great Britain 27 Greville Street, London EC1N 8TN Tel:+44 (0)20 7404 3334 Fax: +44(0)20 7404 8843 e-mail:
[email protected] Website: www.gem-a.info President: Professor A.T. Collins Vice-Presidents: N. W. Deeks, A.E. Farn, R.A. Howie, D.G. Kent, R.K. Mitchell Honorary Fellows: Chen Zhonghui, R.A. Howie, K. Nassau Honorary Life Members: H. Bank, D.J. Callaghan, E.A. Jobbins, H. Tillander Council of Management: T.J. Davidson, R.R. Harding, L. M. Hudson, I. Mercer, J. Monnickendam, M.J. O'Donoghue, E. Stern, I. Thomson, V.P. Watson Members' Council: A.J. Allnutt, S. Burgoyne, P. Dwyer-Hickey, S.A. Everitt, J. Greatwood, B. Jackson, L. Music, J.B. Nelson, P.J. Wates, C.H. Winter Branch Chairmen: Midlands - G.M. Green, North East - N. R. Rose, North West - D. M. Brady, Scottish - B. Jackson, South East - C.H. Winter, South West - R.M. Slater Examiners: A.J. Allnutt, M.Sc, Ph.D., FGA, L. Bartlett, B.Sc, M.Phil., FGA, DGA, S. Coelho, B.Sc, FGA, DGA, Prof. A.T. Collins, B.Sc, Ph.D, A.G. Good, FGA, DGA, J. Greatwood, FGA, S. Greatwood, FGA, DGA, G.M. Green, FGA, DGA, G.M. Howe, FGA, DGA, S. Hue Williams MA, FGA, DGA, B. Jackson, FGA, DGA, G.H. Jones, B.Sc, Ph.D., FGA, Li Li Ping, FGA, DGA, M.A.