A popular guide to minerals : with chapters on the Bement Collection of minerals in the American Museum of Natural History, and the development of mineralogy . NATROLITE Bergen Hill, N. J. Bement Collection, American Museum of Natural History. NATROLITE ON ANALCITE Bergen Hill, N. J. Bement Collection, American Museum of Natural History BEMENT COLLECTION i 67 plates, with surfaces curiously lined, pitted and scored, apparentlyimpressed by the crystallizing calcite; one exquisite specimen, inoctahedral elongation in arborescent shapes and surfaces minutelytriangulated; flattened blades, surface
A popular guide to minerals : with chapters on the Bement Collection of minerals in the American Museum of Natural History, and the development of mineralogy . NATROLITE Bergen Hill, N. J. Bement Collection, American Museum of Natural History. NATROLITE ON ANALCITE Bergen Hill, N. J. Bement Collection, American Museum of Natural History BEMENT COLLECTION i 67 plates, with surfaces curiously lined, pitted and scored, apparentlyimpressed by the crystallizing calcite; one exquisite specimen, inoctahedral elongation in arborescent shapes and surfaces minutelytriangulated; flattened blades, surfaces blistered in blebs, as ifmelted, and a surface webbed with lines. The variations are fullof interest. One rhombic-dodecahedron laminated, with seamededges and hollow faces, comes from the Comstock Lode, and a speci-men (given by Miss Bruce) is a crystallized silver enclosed indatolite. In Copper, the Bement Collection has always been renowmed,and a short inspection shows its extreme excellence, from the beau-ty and crystallographic interest of the, not over numerous, but wiselyselected specimens. There are in the collection interesting groupsfrom Australia, a number of excellent examples from Cornwall,the familiar pseudomorphs from C
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmineral, bookyear1912
