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 29
Fig. 1. Fig. 2. FOKM OF MINEEALS. 23 The following is a description, with figures, of the differ-ent forms above mentioned, beginning withThe Holohedric forms. 1. The hexahedron or cube (fig. 1) is bounded by sixequal squares, has twelve edges, formed by faces meetingat 90°, and eight trigonal…
Precious stones · Building stones · Mineralogy
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