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 50
LS. 43 but on several grounds it is found better to designate it byR or mR, and its complimentary figure by — mR. Whenthe prism or pinacoid arise as its limiting forms, they aredesignated by ooR and OR, though in no respect changedfrom the limiting forms ooP and OP of the pyramid. Thescalenohedron…
Precious stones · Building stones · Mineralogy
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