"Labradorite" Quotes from Famous Books
 ... quartz and augite, these names are, however, representatives of different classes of minerals. There are, for instance, several different minerals commonly classified under the name of felspar, which have been distinguished by mineralogists by the names of orthoclase, albite, oligoclase, and labradorite; and there are at least two sorts of mica, two of hornblende, ...
— Elements of Agricultural Chemistry • Thomas Anderson
... latitudes than farther south. This puzzled me much at first. Evidently, however, it was due in part to the nature of the rock. At Sleupe Harbor, latitude 51 deg., this was granite;[C] farther on it was sienite; then the sienite showed a strong predominance of feldspar; then it became an impure Labradorite; then passed into gneiss; the gneiss became soft, stratified, and frequently intersected by trap;—and with every softer quality of rock there was an improvement in vegetation. This was particularly observable at L'Anse du ...
— The Atlantic Monthly, Volume 15, No. 91, May, 1865 • Various
... certain gem materials, such as true topaz (which splits perfectly across the prism, parallel to its base) is easily accomplished, and it is done in much the same manner as the cleaving of diamond. The feldspar gems, such as moonstone, amazonite, and labradorite, also cleave very smoothly in certain directions. Spodumene, of which Kunzite is a variety, cleaves almost too easily to be durable. Most gem minerals, however, lack such perfect cleavage and when it is desired to remove imperfect parts, or to reduce large pieces to smaller ...
— A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public • Frank Bertram Wade |
