Orthoclase Small 261×320 Medium 523×640 Large 836×1024 Download Tiff Original 1960×2400 | (463.8 KB) Description "Monoclinic. Crystals are usually prismatic in habit and have as prominent forms, clinopinacoid, base, prism, with often smaller orthodomes." — Ford, 1912 Keywords crystal, geology, geometry, mineral, monoclinic, orthoclase Galleries Crystals Source: William E. Ford Dana's Manual of Mineralogy (New York: John Wiley and Sons, Inc, 1912) 221
