. Bulletin - New York State Museum. Science. parallel to the orthopinacoid; also prismatic. Twins are quite frequent; granular or columnar masses also occur. Perfect cleavage parallel to the clinopinacoid is characteristic as well as part- ing planes parallel to the orthopinacoid and hemi- orthodome. The color is a dark grayish or brown- ish black and the luster is submetallic. Wolframite occurs associated with tin ores and other metal- lic minerals notably in the Cornwall and German mines. It is also found in New South Wales and Bolivia and in Connecticut, North Carolina. Missouri and Dakota.
. Bulletin - New York State Museum. Science. parallel to the orthopinacoid; also prismatic. Twins are quite frequent; granular or columnar masses also occur. Perfect cleavage parallel to the clinopinacoid is characteristic as well as part- ing planes parallel to the orthopinacoid and hemi- orthodome. The color is a dark grayish or brown- ish black and the luster is submetallic. Wolframite occurs associated with tin ores and other metal- lic minerals notably in the Cornwall and German mines. It is also found in New South Wales and Bolivia and in Connecticut, North Carolina. Missouri and Dakota. It is used in the manufacture of tungsten steel and as a source of the tungsten salts, which are of considerable importance in dyeing. „ , J tt Scheelite CaW04 Scheelite is a calcium tungstate crystallizing in the pyramidal class of the tetragonal system. The crystals are pyramidal in habit (fig. 248), more rarely tabular. These often occur in drusy crusts. The color is white or light shades of yellow, brown, red, rarely green. The luster is vitreous tending to adamantine. Scheelite occurs in crystalline rocks associated with cas- siterite, fluorite, topaz, apatite, molybdenite or wolframite, in- crusting or in quartz, and sometimes associated with gold. It is of comparatively rare occurrence but is found at Monroe and Trumbull Ct. and in South Carolina, Nevada, Idaho and Colorado. ,„ , Wulfenite PbMoO, Wulfenite is a lead molybdate crystallizing in the pyramidal class of the tetragonal system. The crystals are commonly thin tabular in habit of the general type shown in fig. 249; octahedral or prismatic forms are much. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum; New York State Museum. Albany : New York State Education Dept
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
