Paul F. Kerr’s Optical Mineralogy (most notably the Fourth Edition, published in 1977) remains a definitive laboratory handbook and foundational text for identifying minerals using a polarizing microscope. The book is designed for "maximum self-instruction," bridging the gap between complex optical theory and the practical needs of a student in a laboratory setting. Core Structural Framework
The heart of Kerr’s contribution lies in his systematic approach to mineral identification. Before the advent of digital databases, the determinative table was the petrologist’s most valuable asset. Kerr organized minerals based on their optical properties in a logical, ascending order—typically by refractive index or birefringence. Optical Mineralogy Paul F Kerr.pdf
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