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 (1912)
Gratacap, L. P. (Louis Pope), 1851-1917 · New York : D. Van Nostrand · leaf 212
eencubes from Cornwall with feathery edges of purple, inclusions ofblack specks and interior colored boundaries (phantoms), also oc-tahedrons and tetrahexahedrons; from Brienz, Switzerland, lowscolloplike depressions, pyramidal pits, wrinkling lines, finely madepin-point holes, the whole looking… … GUIDE TO COLLECTIONS 139 quantities and its exportation constitutes a special trade; it is usedin the manufacture of aluminum and a very pure carbonate ofsoda. Specimens from this typical locality are shown in the cases.It is found at the base of Pikes Peak, Colo., and has been reportedfrom…
American Museum of Natural History. Bement Collection of Minerals · Mineralogy
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