This report details California's mineral production and lists its mineral producers for the year 1943. As a historical document from the California Division of Mines, it serves as a primary source for understanding the state's geological resources and industrial landscape during a critical period of World War II. The publication aims to provide a comprehensive overview of the mining industry, cataloging the output of various minerals and identifying the companies and individuals involved in their extraction.

This publication is a valuable historical record for geologists, mining historians, and researchers interested in California's resource economy during World War II. Its detailed statistics and producer directory offer direct insight into the state's mineral output and industrial infrastructure at a specific point in time. The reproduction acknowledges potential imperfections inherent in preserving older documents, emphasizing its cultural importance and commitment to accessibility.