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 49
esents the combination 00 P. 00 P2,and cannot occur as a simple form. An example of a morecomplicated combination is seen in fig. 39, of a crystalof apatite, whose sign with the corresponding letters isooP(3jr) . ooP2(e) . OP(P) . AP.(r) . P(a;) . 2P(2) . P2(a) .2P2(s) . 4P2(^). Hexagonal minerals…
Precious stones · Building stones · Mineralogy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
