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A fascinating compendium of the metals, rocks, organic materials, and gems that have had the greatest impact on the development of human civilisation from prehistory ...
Fantastic goldfields map created exclusively for the prospector. Well researched from historical records and extensive field expeditions this map includes alluvial workings, reef lines & ...
acteristics of earth's treasured jewels and metals. It includes over 400 examples from across the globe, with a detailed introduction on identifying and classifying ...
