dichroite

n.

堇青石；

dichroite
dichroite
3. On the Resemblances which Microscopic Objects in Dichroite and Amethyst have to some of the lower forms of Organic Life
Preparation and characterization of Ni based monolithic catalysts for steam reforming of methane
Study on Raman Spectra of Sapphire and its Similar Gemstones
iolite
cordierite
Cordierit m
twin colors
Rough Cut: Sustainability Issues in the Coloured Gemstone Industry