TANZANIAN TOURMALINE

An authoritative synthesis of East Africa's premier gemstone, Tanzanian Tourmaline: Geology, Gemology, Lapidary Arts & Trade Dynamics provides a rigorous exploration of the geological, physical, and economic dimensions of the tourmaline group within Tanzania. Authored by Rajnikant Dubey, this volume examines the complex tectonic settings of the Mozambique Metamorphic Belt that gave rise to exceptional tourmaline chemistry. The text meticulously details diagnostic gemological properties, chemical variations (including Chrome Dravite and Paraíba-type tourmalines), and advanced spectroscopic methods essential for accurate laboratory identification. Beyond analytical gemology, the book provides specialized coverage on lapidary physics-addressing crystal orientation, pleochroic management, and critical angles-alongside an empirical analysis of East African gemstone supply chains, rough grading standards, and ethical trade considerations. An indispensable reference for professional gemologists, geoscientists, lapidary artists, and mineralogists.