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 75
Fig. 89. Fig. 90. Fig. 91. made so very symmetrical and regular that the line ofjunction cannot be observed on the face of the clinopinacoid.The two hemipyramids P (s) (like — P {I) in the gypsumcrystal above) form on one side a re-entering, on the othera salient angle. Hornblende, wolfram, and…
Precious stones · Building stones · Mineralogy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
