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. 72. Fig. 73. (fig. 72), are frequently united. The same law prevails inthe intersecting cubes of fluor spar, iron pyrites, and galena, 64 A POPULAR TREATISE ON GEMS. represented in iig. 73. In fig. 74 of zinc-blende, two rhom-bic dodecahedrons are united by a face of the octahedron.In the…
Precious stones · Building stones · Mineralogy
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