A popular treatise on gems, in reference to their scientific value; a guide for the teacher of natural sciences, the jeweller, and amateur: together with a description of the elements of mineralogy, and all ornamental and architectural materials .. (1859)
Feuchtwanger, Lewis. [from old catalog] · New York, D. Appleton & company · leaf 71
Fig. 74. Fie 75. rarely occur, but are seen in chalcopyrite, and one or twoother minerals. Where the axes are inclined the plane ofunion is very often one of the faces of the pyramid Poo, orone of those faces that would regularly replace the polaredges of the fundamental form P. The crystals of tin… … Fig. 76.
Precious stones · Building stones · Mineralogy
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