Arizona republican., 1909-02-25

to a railroad, and then shipped to this city to be cut and polished It shipped here in great logs and stumps weighing many tons each, just as they have lain for many ages during the process required by nature to turn the wood into beautiful stone. The process of saving the stone up in shape for polishing is most tedious. the huge machinery used for the purpose being able to saw only from an inch to three inches a day into it. After being cut and polished the stone is worked up into every con- ceivable shape, from cuff buttons to tops for center tables and great col umns, which cost a small fortune. All kinds of jewelry is made from It, ss well as trlnkets and handsome articles for souvenirs"
 SILVER.
 In ponderous masses near Globe, Gila county.
 A fire, large nugget of nearly pure silver was found in the placer de- posits about twelve miles north of Globe in 1895. It weighed thirty-one pounds and was 800 fine. It was fully rounded by much attrition, all angles and asperities of surface had been worn away. This mass was figured and described in the govern ors report of 1899, p. 37. It was probably derived originally from the deposits of the metal in limestone. associated, as found today in the Stonewall Jackson mine, with horn silver and other lver-bearing min- erals.
 The Stonewall Jackson is one of the famous old mines of Globe dis trict, and is reported to have yielded over a million dollars worth of silver. from the years 1876 to 1883. It is now being reopened, and at the depth of 2sO feet a rich vein of silver is reported. QsOs)
 The Silver King mine in Pinal county has yielded beautiful speci- mems of the white metal, massive and in the filamentous form, coarse and fine, very white and striated as if made up of bundles of fine wire, or ranging in size from the size of a pin or knitting needle to masses half an inch through, but solid and much twisted and gnarled. The metal is also finely filiform in long wires, in one instance twenty-four inches long. and in threads as fine as hair or silk, filling cavities or branching from the coarser wires. It occurs also in sheet-like masses and plates and in thin films forming regular continuous plating upon the surface of quartz crystals where they l are found imbedded in argentite or stromeyerite. It is found similarly on 1 the face and cleavages of black zinc blende. Distinct crystals of the metal were extremely rare in the mine. A few small octahedral crystals were nestled in a cavity. The filaments are l often subvided toward the extremity ! and ramify like the tendrils of a | vine They sometimes bear aloft on | their ends detached and beautiful | crystals of calcite. So also the silver | wires penetrated crystals of quartz | or were implanted on them. This Silver King native silver is l remarkably pure. It has been shown | by repeated assays to be from .990 to | e97 (thousandths) fine. It does not | blacken in nitric acid. and does not 1 show a trace of copper or gold by | the usual test. It is estimated that one-third of the value of the product of the mine was in the metallic form.
 At the Tiger mine, Yavupai county.
  blende At the Eureka Mabel, Santa Cruz county, with grey copper.
 The very large masses of silver found at the celebrated Planchas de Plata in Sonora, near the Arizona line, at Nogales, should be mentioned. The heaviest weighed 10s arrobas (2,700 lbs.)
 SILVER GLANCE.
 The common name among miners of Arizona for the species of "Argsn- tite," to which reference is made.
 At the Silver King mine, Pinal county, in loose masses scattered through the soil of ths croppings, partly silver glance and in part stro- meyerite, both derived by weathering from the lode, where 1t occurs in close association with the metal
 Found. also. in the veins of the Tyndall district, Santa Cruz county. at the EurekaMabel and at the Con- stitution lodes, associated with tetra- hedrite and manganese spar.
 At the Montezuma lode, Empress of India claim, Santa Cruz county, and at the mines of Cerro Colorado.
 sMITHsoNITE.
 Zine carbonate, the Dry bone of the zinc miners of the Mississippi valley.
 Occurs sparingly where sphalerite is weathered and decomposed.
 SPHALERITE.
 Zine blende, the sulphide Of zinc, or "bIack jack" of some eastern mining districts, is a comparatively common species occurring under various con- ditions in the mineral veins of Ari zona, but largely in close association with galenite and silver-bearing min erals. It is often of itself largely silver bearing At the famous Silver King mine, for example, it is in close association with native silver, so close that fractured masses of blende are held together by wire-like threads of very white, pure silver. The blende of this mine is generally light emer- aid or a-green in color and trans parent, forming very beautiful cabi net specimens, especially when tra versed by native silver or closely associated with stromeyerite and sil- yer sulphide. There are several important occur rences of blende in Santa Cruz coun- ty At the southern end nf the Huachucas it is found massive in limestone with galenite and is partly