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 . Quartz, where mica constitutes the interposed body, and similaroccurrences are observed in vesuvianite, garnet, epidote, wolframite. Different minerals may be combined in the same crystallinegrowth as biotite (a mica), and muscovite; tourmaline layers ofdifferent colors and composition, also of garnet, while an octahedronof chrome-alum suspended in a colorless potash-alum becomes en-cased in a transparent envelope. The intergrowth of th
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 . Quartz, where mica constitutes the interposed body, and similaroccurrences are observed in vesuvianite, garnet, epidote, wolframite. Different minerals may be combined in the same crystallinegrowth as biotite (a mica), and muscovite; tourmaline layers ofdifferent colors and composition, also of garnet, while an octahedronof chrome-alum suspended in a colorless potash-alum becomes en-cased in a transparent envelope. The intergrowth of the feldsparsis very well known, as in the alternating structure of orthoclaseand albite. Porous, cellular or pitted conditions prevail in mineralsthrough a loose aggregation or interrupted growth. The variousdescriptive terms previously reviewed indicate the very aberrantand greatly varied superficial aspects of minerals and representmodified states of consolidation from amorphous (colloidal or jelly-like; silica, opal), through crystalline (not crystallized) bodies, asagate, limonite, to the regularly bounded surfaces of crystals,quartz, beryl, QUARTZ (after Barite) ENCRUSTING Near Silverton, Col. Bement Collection, American Museum of Natural History
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmineral, bookyear1912
