Apophyllite Small 220×320 Medium 441×640 Large 705×1024 Download Tiff Original 1653×2400 | (342.9 KB) Description "Tetragonal. Usually shows a combination of prism of second order, pyramid of first and basal plane." — Ford, 1912 Keywords crystal, geology, geometry, mineral, pyramid, tetragonal Galleries Crystals Source: William E. Ford Dana's Manual of Mineralogy (New York: John Wiley and Sons, Inc, 1912) 265
