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 . a ?, > •*- ^ c w o CO c -^ < -^. ;?; C . oPC -Q rt H S -.^ > t: < ;^ .2 oU « GUIDE TO COLLECTIONS 171 from Gouverneiir, N. Y., the flat black prisms in mica and theblue (indicolite) from Goshen, Mass., are examples of its diversi-fied appearance. The peculiar curved prisms from Yancy Co.,N. C, the radiated specimens from Warwick, Mass., Oxford,Warren and Lynn, N. H., are interesting- examples of its less fre-quent occurrence
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 . a ?, > •*- ^ c w o CO c -^ < -^. ;?; C . oPC -Q rt H S -.^ > t: < ;^ .2 oU « GUIDE TO COLLECTIONS 171 from Gouverneiir, N. Y., the flat black prisms in mica and theblue (indicolite) from Goshen, Mass., are examples of its diversi-fied appearance. The peculiar curved prisms from Yancy Co.,N. C, the radiated specimens from Warwick, Mass., Oxford,Warren and Lynn, N. H., are interesting- examples of its less fre-quent occurrence. Strong- groups of radiating black crystals fromNew York Island are of interest, and the large single crystals inquartz, while the fine stout prisms in the Chamberlain collectionof the New York Mineralogical Club at the American Museumof Natural History are of unique beauty. Tourmaline occurs ingranites, gneisses, schists and limestone, and is frequently devel-oped in the vicinity of eruptive rocks. Four varieties of tour-maline have been established upon color and chemical composition: Alkali tourmaline, containing soda, potash or lithia; colors,green, red and colorless. Iron tourmaline
Size: 1687px × 1481px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectmineral, bookyear1912
