Volume 30 No. 3/4 July/October 2006 The Gemmological Association and Gem Testing Laboratory of Great Britain The Gemmological Association and Gem Testing Laboratory of Great Britain Registered Charity No. 1109555 27 Greville Street, London EC1N 8TN Tel: +44 (0)20 7404 3334 G Fax: +44 (0)20 7404 8843 e-mail:
[email protected] G Website: www.gem-a.info President: E A Jobbins Vice-Presidents: N W Deeks, R A Howie, D G Kent Honorary Fellows: Chen Zhonghui, R A Howie, K Nassau Honorary Life Members: H Bank, D J Callaghan, E A Jobbins, J I Koivula, I Thomson Chief Executive Offi cer: J M Ogden Council: A T Collins – Chairman, S Burgoyne, T M J Davidson, S A Everitt, M McCallum, M J O’Donoghue, E Stern, P J Wates Members’ Audit Committee: A J Allnutt, J W Collingridge, P Dwyer-Hickey, J Greatwood, G M Green, B Jackson, D J Lancaster Branch Chairmen: Midlands – P Phillips, North East – M Houghton and S North, North West – D M Brady, Scottish – B Jackson, South East Branch - P J Wates, South West – R M Slater Examiners: C Abbott, A J Allnutt MSc PhD FGA, L Bartlett BSc MPhil FGA DGA, He Ok Chang FGA DGA, Chen Meihua BSc PhD FGA DGA,Prof A T Collins BSc PhD, A G Good FGA DGA, D Gravier FGA, J Greatwood FGA, S Greatwood FGA DGA, G M Green FGA DGA, G M Howe FGA DGA, B Jackson FGA DGA, B Jensen BSc (Geol), T A Johne FGA, L Joyner PhD FGA, H Kitawaki FGA CGJ, R J Lake FGA DGA, Li Li Ping PhD FGA DGA, M A Medniuk FGA DGA, T Miyata MSc PhD FGA, C J E Oldershaw BSc (Hons) FGA DGA, H L Plumb BSc FGA DGA, N R Rose FGA DGA, R D Ross BSc FGA DGA, J-C