Identifier: popularguidetomi00grat (find matches)
Title: 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
Year: 1912 (1910s)
Authors: Gratacap, L. P. (Louis Pope), 1851-1917
Subjects: American Museum of Natural History. Bement Collection of Minerals Mineralogy
Publisher: New York : D. Van Nostrand
Contributing Library: Robarts - University of Toronto
Digitizing Sponsor: University of Toronto

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BEMENT COLLECTION 271 Laurite, cubo-pyritohedral Skiitterndite, and many Marcasites, per-ishable but attractive. Arsenopyrite is well represented with a notable specimenfrom Cornwall (2065), and strong crystallizations from Saxony,and some twins and elongated crystals of the cobaltiferousDanaite. The Glaucodot crystals are large, well developed; 2088shows three intersecting crystals, domes and prisms, of high qual-ity. The tellurides are expensive treasures for the mineralogist,if the finest specimens are sought for, and the Bement Collectionboasts of some splendid individual Sylvanite, Calaverite, Krenneritc,and Nagyagite. As the eye moves over the rapidly succeeding species, it encountersmany surprises; here is a thin (pinacoidal compression) crystal ofGuejarite, crystals of Zinkenite, clear single crystals of Miargyrite,large crystal of Binnite with a, o, and n, Dufrenoysite in a prismwith domes well developed, a striking Diaphorite in a divergentgroup of crystals on siderite in a

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