Arizona republican., 1909-02-25

l dry bone' or SmithSonite. The Spha lerite of the Silver King presented itself in a variety of forms, some times in beautiful transparent, oil green crystals. and again in black masses without any crystalline facets except by cleavage. The green crys- tals were so brittle and easily split that it was rare to get one with a single perfect plane. The fragments indicated compound twined dodeca hedral crystals. The ore from the lower levels of the mine, or rather. the concentrates, obtained from such ore and shipped in quantity. con- tained nearly IS per cent of zinc in the form of blende.
 sPANGoLlTE. Basic chloro- sulphate of copper and aluminium.
 A rare species discovered and de- scribed by the late Prof. S. L. Pen field of Yale university in 1890: from some Arizona locality, the exact place not known.
 Lindgren and Hillebrand. in 1904. reported the occurrence of this species on some specimens from the Metcalf mine of the Arizona Copper Mining company taken from the workings in the great open-cut not more than 100 feet below the surpace. The crystals occur on altered porphyry. | which is traversed by veinlets and masses of cuprite. This cuprite con- tains native copper and is covered by | crusts of malachite, brochantite and | chrysocolla. The crystals are incon- 1 spicuous and difficult to obtain free | zA NHA n1n oa6 tfxaI reactions of the mixed copper min |
 Hydrous phosphate of aluminium; | is given off first. T hen appears | suddenly a white sublimate near the | assay which seems to form or at once | change to minute colorless drops. This deposit can be driven slowly up the l tube followed at its lower. sharply l defined edge by dark yellow brown | dots which on coating solidify green ish crystalline aggregates. and the | part of the tube between them and l the assay thus shows under lens deli cate, feathery crystallizations like | frost markings on window panes. Down in the flame the glass becomes 1 colored red Gu o?) and in parts | yellow. On charcoal the blowpipe l flame is colored azure blue and at | the same time green" (Am. Jour. Sci, Dec, 19O4.)
 SECULAR IRON.
 Mirror Iron, Eisen- glimmer, Hems- tite.
 Of frequent occurrence in Arizona both massive and in small veins and nodular masses interesting to collect ors of minerals.
 Among other occurrences; in brill iant folia in white quartz, Turkey Creek mining district, Yavapai Go. (Ryan 1903)
 In rosettes, Mammoth (Pool) From Quartzsite. Yuma Go. (See Hema- tite.)
 Specular iron in large flat folia at the Iron Age. Bouse region. northern part of Yuma county; in large quan- tity north of the Desert gold mine.
 Mineral paint, 12 miles north of Parker.
 STIBNITE.
 Antimony trisuIphide; Sulphur 2s.6. sntimony 71.4.
 In veins at Warmers, north of Phoe- nix, but not worked, and as an as- sociate or constituent of some of the lead ores and silver bearing ores.
 At Fl Plomo in Sonora in the Altar district. Sparingly in the Tucson mountains, and the Sierritas.
 sTRoMEYERITE.
 Sulphide of silver and eopperI suI- phur 15.s, oliver 53.1, copper st.1.
 This somewhat rare and interesting species was discovered fin the Silver King mine (vide Silver King report, 1Ss3), Pinal county It was found in masses of considerable size. in blocks from an inch in thickness to masses. weighing four or five pounds. It was more abundant on the third and fourth levels of the mine than below. It was generally penetrated by quartz crystals and was closely associated with the other minerals of the lode. The fracture was conchoidal and the freshly broken surfaces were brill iantly lustrous, splendent and metal | lie Color dark bluish- black, lead-like between that of graphite and anthra- cite coal. Streaky brown or reddish black. Hardness about 3. Very brittle but packs under the hammer. : Specific gravity 6.22. Soluble in hot nitric acid. Contains 51.47 per cent of silver and about 30 per cent of copper. It pures quietly before the blowpipe. 2
 TENORITE.
 Black oxide of copper-Cupric oxido. , Oxygen POP. copper 7s.s. In the surface or oIidized copper !, ores in small quantity, but generally ,, mixed with iron oxides or manganese oxide as impurities. In the Copper Queen mine black , mixture of oxide of copper and Of . oxyd (probably wade con- . tains Is per cent of copper.
 TETRADYMITE. Telluride of bismuth, occurs in an f auriferous quartz vein at Minnehaha, C a timbered valley in Yavapai county. e about twelve miles east of Walnut f Grove. The locality is more generally ' known as the Bismuth claims, Mont gomery mine, but has not been ex- o tensively worked for either bismuth r or gold. f
 TETRAHEDRITE. | Grey copper ore, Fahlerz; sulphur i 23.1, antimony PAS, copper 52.1. [ common ore of silver in the sil s yer mines or Arizona but varies great I y in the quantity of silver at differ " ent localities.
 At the famous Silver King mine it | was one of the chief silver bearing minerals, more abundant in the upper |