Ditrigonal Prism Small 279×320 Medium 557×640 Large 891×1024 Download Tiff Original 2089×2400 | (302.6 KB) Description Principal forms of the hexagonal system: ditrigonal prism Keywords ditrigonal prism, forms, geology, hexagonal Galleries Prisms Source: Amadeus W. Grabau A Textbook of Geology (Boston: D.C. Heath & Co., 1920) 46
