Vols. for 1986-Apr. 1990 include: Proceedings of the Gemmological Association of Great Britain and association notices; for Oct. 1990- include: Proceedings of the Gemmological Association and Gem Testing Laboratory of Great Britain and notices
Numbering
Some numbers combined
Issuing Body
Vols for Oct. 1990-Jan/Apr. 2007 published by: the Gemmological Association and Gem Testing Laboratory of Great Britain; July/Oct. 2007- published by: the Gemmological Association of Great Britain
Notes
Description based on: Vol. 20, numbers 1 (Jan. 1986); title from PDF cover (Association's Web site, viewed May 16, 2018)