Volume 22 No. 4. October 1990

^{Journal of (jremmology

Contents

Gemstone prospects in Central Nigeria jf. Kanis and R .R. Harding 195

Hematite inclusions in Eonyang amethyst from Korea Won-Sa Kim 204

Gemmological visual aids J. Eadie 207

Bead buyers and parcel pickers filter set R.K. Mitchell 212

Water in beryl - a contribution to the separability of natural and synthetic emeralds by infrared spectroscopy

K. Schmetzer and L. Kiefert 215

Gemmological teaching in Hong Kong and China J.B. Nelson 224

Detection of synthetic emeralds by thermal conductance RG. Read 233

Gemmological Abstracts 235

Book reviews 243

Proceedings of the Gemmological Association and Gem Testing Laboratory of Great Britain and Notices 246

Letter to the Editor 250

Copyright© 1990 The Gemmological Association and Gem Testing Laboratory of Great Britain

Registered Office: Palladium House, 1-4 Argyll Street, London W1V IAD

ISSN: 0022-1252

Produced by Green Belt Studios: Printed by Quadrant Offset, Hertford, England.