Gypsum Small 104×320 Medium 208×640 Large 332×1024 Download Tiff Original 779×2400 | (233.2 KB) Description "Monoclinic. Crystals usually tabular parallel to clinopinacoid; in diamond-shaped crystals with edges beveled by prism and pyramid faces. Other forms rare. Sometimes twinned." — Ford, 1912 Keywords crystal, geology, geometry, gypsum, monoclinic, tabular Galleries Crystals Source: William E. Ford Dana's Manual of Mineralogy (New York: John Wiley and Sons, Inc, 1912) 304
