. Precious stones, a popular account of their characters, occurrence and applications, with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. With an appendix on pearls and coral. Precious stones; Pearls; Corals. Fig. 31, a-i. Crystalline forms of diamond. while special features peculiar to diamonds from particular localities will be mentioned under the description of these localities. ^ Observations on the crystalline form of diamond date back to the beginning of the seventeenth century, many diamond crystals having been described by Keppler, Steno J3oyle,
. Precious stones, a popular account of their characters, occurrence and applications, with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. With an appendix on pearls and coral. Precious stones; Pearls; Corals. Fig. 31, a-i. Crystalline forms of diamond. while special features peculiar to diamonds from particular localities will be mentioned under the description of these localities. ^ Observations on the crystalline form of diamond date back to the beginning of the seventeenth century, many diamond crystals having been described by Keppler, Steno J3oyle, and others. Rome de ITsle and Haiiy, the founders of scientific crystallography, were, at the beginning of the nineteenth century, the first to correctly interpret the different forms, and to determine the hemihedral development of the crystals. Great credit is also due to Gustav Rose for his exhaustive study of diamond crystals made at a later date. The results of his investigations were published in 1876 after his death by A. Sadebeck, who added numerous observations of his own. Crystals of diamond belong to the cubic system, and, according to the views of the majority of mineralogists, to the teti-ahedral-hemihedral division of this system. Certain. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bauer, Max, 1844-1917; Spencer, Leonard James, 1870- tr. London, C. Griffin and Company, Ltd.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectpreciousstones, booky
