Raman spectroscopic analysis of chalcedony texture

Abstract

Moganite is main constituent mineral of chalcedony, and is intergrowth with quartz crystals at the nanometer scale. Textures of chalcedony samples from several localities in Japan were observed by electron and optical microscopies, and measured its moganite contents by Raman spectroscopy. We present the results about variety of Raman spectra with texture.