Hematite Small 320×135 Medium 640×270 Large 1024×432 Download Tiff Original 2400×1012 | (227.1 KB) Description "Hexagonal-rhombohedral. Crystals usually thick to thin tabular. Basal planes prominent, often showing triangular markings." — Ford, 1912 Keywords basal, crystal, geology, geometry, hexagonal, mineral, rhombohedral Galleries Crystals Source: William E. Ford Dana's Manual of Mineralogy (New York: John Wiley and Sons, Inc, 1912) 184 Courtesy the private collection of Roy Winkelman
