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 58
Fig. 59. (odPoo) (P) . ooP(/) .P(&).augite is represented in fig. Fig. 60. The most common form of60, with the sign ooP(m) . 52 A POPULAR TREATISE ON GEMS. 00 Poo (r) . (ooPoo) {I) . P(5). Fig. 61 is a crystal of com-mon felspar or orthoclase, composed of the clinopinacoid(00Poo) (Jf), the…
Precious stones · Building stones · Mineralogy
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-113-298.webp)
