Abstract
Interference colors provide one of fundamental criteria for identification of minerals in petrological studies. Therefore, it is important to have an interference color chart with reliable color reproduction and without degra dation. A computer program that pre cisely reproduces normal interference colors has been implemented (Fig.1). It synthesizes interference color charts from some standard illuminants using a colorimetric approach (Fig.2). Details of the program and the mean ings of the technical terms are described in Kato (2000). The interfer ence color chart synthesized from the CIE standard illuminant D55 corre sponding to the light from a halogen lamp through a blue CB filter is pre sented here for the petrological purpose(Fig.3)
