. Bulletin - New York State Museum. Science. GUIDE TO THE MINKRALOGIC COLLECTIONS 125 Fibrous, granular and marblelike masses occur, sometimes exhibiting a sugarlike appearance on the fracture. The color is commonly white or gray, often bluish, reddish or brick-red. The luster is vitreous inclining to pearly. Anhydrite occurs associated with rock salt, gypsum and lime- stones of various ages. It is found in New Brunswick and Noya Scotia and to a limited extent at Lockport X. Y. and in eastern Pennsylvania and Tennessee. Anglesite PbS04 Anglesite is a sulfate of lead containing 2QA$ sulfur trio
. Bulletin - New York State Museum. Science. GUIDE TO THE MINKRALOGIC COLLECTIONS 125 Fibrous, granular and marblelike masses occur, sometimes exhibiting a sugarlike appearance on the fracture. The color is commonly white or gray, often bluish, reddish or brick-red. The luster is vitreous inclining to pearly. Anhydrite occurs associated with rock salt, gypsum and lime- stones of various ages. It is found in New Brunswick and Noya Scotia and to a limited extent at Lockport X. Y. and in eastern Pennsylvania and Tennessee. Anglesite PbS04 Anglesite is a sulfate of lead containing 2QA$ sulfur trioxid and 7-'!.<K lead oxid. The crystals are orthorhombic and of varied habit. Massive forms are extremely common, the mineral frequently forming in concentric layers around a core of galena. Anglesite is white, gray or more rarely bluish or yellowish in color; the crystals are often transparent and colorless. The luster is adamantine to vitreous. It is a frequent decomposition product of galena with which it is commonly associated and often alters to cerussite. It is found throughout the United States in the lead regions notably in Pennsylvania. Missouri, ^"iseonsin and Colorado. Extensive deposits occur in Mexico and Australia. It is mined with 01 her lead minerals as an ore of lead. Celestite SrS04 Celestiteis a sulfate of strontium sometimes containing small amounts of calcium and barium. It crystallizes in the orthorhombic system in forms generally similar in type to those of barite, often tabular parallel i the base or prismatic to the macro or brachy axes ifiir. 244). Fibrous massive forms occur with ;i parallel or radiated silky structure; also cleavable musses and more rarely granular varieties. Iu color celes- tite varies from while to pale blue, some- times reddish; the crystals are often I runs- parenl and colorless. The luster is vitre- ous to pearly. t'deslile is of freijllell! oer l| r ie ||ri • ill lillleSHMle illld Sillldsloiie. in beds of gypsum, rock
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