 | | Book (edition) | | annexed figures, 266, of fluorite, and f. 267, of hematite. Other examples occur in the pages following,...obvi- ous that the distinction between Fluorite. Hematite. contact and penetration-twins is not a very important...complex consequently the vertical axis. f 267 (hematite), and in f. 289, 290. also of twin chabazite,...the crystals of rutile on tabular crystals of hematite, the vertical axes of the former coinciding with...referred to known mineral species, as the scales of hematite to which the peculiar character of aventurine |  | | Book (edition) | | of minute grains or crystals of magnetite, or hematite, or menaccanite. CRYSTALLINE AGGREGATES. 5....others, of a reddish black or black color, of hematite. Moss-like forms also occur, as in c. moss agate...crysbrilliancy and gives well-defined images. tals of hematite, cassiterite, some specimens of quartz and pyrite...blue or violet color a result not obtained with hematite, the mineral it most resembles. 6. Test for Fluorine...Teneriife, Java, Hamen. New Zealand, Deception Island, and most active volcanic regions, aiford more |  | | Book (edition) | | interpenetrate, as f. 266, of fluorite, and f. 267, of hematite. Other examples occur in the pages following,...axis. penetration twin of chabazite, also f 267 (hematite), and in f. 289, 290. It is also common with quartz...the crystals of rutile on tabular crystals of hematite, the vertical axes of the former coinciding with...referred to known mineral species, as the scales of hematite to which the peculiar character of aventurine...material, feuch as chlorite, tourmaline, rutile, hematite, asbestos, and many other minerals. " * Reference |
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