Pseudochroism in twin calcite plates

Abstract

The category of pseudochroism phenomenon also includes the well-known, frequently observed phenomenon of coloring of twin plates growing through calcite grains along the planes of the first obtuse rhombohedron (1012). In this case, the phenomenon of pseudochroism is often very bright for this reason, and also because the position of the twin plates is here easily defined, the phenomenon can be more easily subjected to research. This work represents an attempt at such a study. The application of a “universal” method to the study greatly enriches the picture of the phenomenon and allows us to answer some of the questions it raises. Therefore, I decide to publish the results obtained despite the awareness of the incompleteness of the coverage of the issue.