An illustrated reference to tortoiseshell - this is the only book that covers tortoiseshell from all aspects.
Maggie Campbell Pedersen is a Fellow of the Gemmological Association of Great Britain, and an Associate of the British Institute of Professional Photography. For many years she has specialised in organic gem materials - that is, those of plant or animal origin - where her work includes identification, teaching, writing and research. She has given lectures and seminars world-wide and is a regular contributor to gemmological publications.
