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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 456

An illustration from 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, leaf 456
wenty-four facets.9.—An Octahedron, the primary form. u PLATE lY. Kemaekable rough Diamonds. No. 10.—A rough Brazilian Diamond. 12.—A regular Tetrahedron. 12.—A round, concretional, rough Diamond, called Boort. 18.—A rough Brazilian Diamond. 14.—A rough cubical Diamond. 15.—A rough Brazilian…

Precious stones · Building stones · Mineralogy

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