Author : Samuel Scott
Publisher : Theclassics.Us
Page : 22 pages
File Size : 38,74 MB
Release : 2013-09
Category :
ISBN : 9781230344799
Book Description
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 edition. Excerpt: ...sulphuric acid, or by hydrochloric acid, to give a colorless solution, which, treated with metallic zinc, becomes intensely blue, but soon bleaches on dilution. Characterized by its high specific gravity. Wolfram is often associated with tin ores; also in quartz, with native bismuth, pyrite, galenite, blende, etc. Found in the Etta and Bob Ingersoll Tin mines near Keystone, on Sunday Gulch and near Berne. QUARTZ. H.=7. G.=2.5--2.8. I ustre vitreous, sometimes inclining to resinous; splendent; nearly dull. Colorless when pure; of various shades of yellow, red, brown, green, blue, black. Streak white of pure varieties; of impure, often of the same color but much paler. Composition: pure silica=oxygen 53.33; silica 46.67=100; in massive varieties often mixed with a little opal; silica, impure varieties often contain iron sesquioxide, caleium carbonate, clay, sand and various minerals. Varieties: 1. Crystallized vitreous in lustre. 2. Flint-like, massive, or cryptocrystalline. The first division includes all ordinary vitreous quartz, whether having crystallized faces or not. The varieties under the second are in general acted upon somewhat more by attrition, and by chemical agents, as fluohydric acid, than those of the first. In all kinds made up of layers, as agate: successive layers are unequally eroded. ROSE QUARTZ. Fine specimens of rose quartz of deep rose-red and pink colors are plentiful in many localities of the granitic region around Harney's Peak. The color is due to titanic oxide. Smoky quartz, massive, brownish-black and nearly opaque is found near Keystone. The color is due to organic compounds. Milky quartz, milk-white and nearly opaque. Lustre greasy. Occurs two miles east of Custer Peak on the north fork of Box Elder Creek...