CHAMOISTTE. " 



ing along the chain of the Alps on one side 

 into Austria, and on the other into Saltzburg. 

 The Erzberg, between Eisenerz and Vordern- 

 berg, la Stvria, is composed of gneiss, upon 

 which rests, on the north and Avest sides, 

 an immense bed of Sparry Iron. This is the 

 great depot of the ore which is used in the 

 manufacture of the Styrian steel. Fine 

 crystals of Sparrv Iron are met Avith m vems 

 of considerable size, traversing Clay-slate, 

 at Harzgerode, in the Harz. At Freiberg 

 it is found in silver veins. At Somorostro, 

 in the province of Biscay, in Spain, there is 

 a whole hill composed of this ore, which has 

 been worked for several thousand years. 

 In the United Kingdom it occurs chiefly m 

 Cornwall, and in the N. W. of Devonshire 

 and Somersetshire, Avhere considerable quan- 

 tities are raised on Exmoor and the Bren- 

 don Hills. Fig. 103 represents crystals 

 found at Fowev Consols, and fig. 104 the 

 small brilliant crystals presenting the form 

 of Dog's-tooth Spar, met with at Buckler's 

 Mine, near St. Austell. It affords an iron 

 which is admirably suited for making steel. 

 The black variety is said to afford the best 

 kind of iron. 



Brit. Mus., Case 48. 



M. P. G. Principal Floor, Wall-case £0 

 (British). 



Chamoisite. Probably a mixture of 

 Magnetic Iron and a hydrous silicate of 

 alumina. It has a dark greenish-grey 

 earthy appearance, with a granular, uneven, 

 or earthy fraeture. Magnetic. S.G. 3 

 to 3-4. 



Comp. Near to Siderochisolite, 2 (5Fe, 

 bi) + Al, 3Si + 13H. 



Arialt/sis from Chamoisiu, by Berthier: 

 Protoxide of iron . . . 60-5 

 Alumina . . - . 7'8 



Silica 14-3 



Water 17-4 



100-0 



When heated, gives off water, becomes 

 more strongly magnetic, and turns black, 

 or, if the air has access to it, reddish. 



Locality. In beds, of small extent, in a 

 limestone abounding in Ammonites, at Cha- 

 moisin in the Valais. 



Brit. Mus., Case 26. 



ChajSttonnite, Shepard. A meteoric mine- 

 ral, forming compact black veins and angu- 

 lar-shaped masses. Fracture subcouchoidal. 

 H. 6-5 to 7. S.G. 3-48. 



£B fuses at the edges to a dark black slag. 



CHENOCOPEOLITE. 75 



Named after the Chantonnay stone, in 

 w^hich it is found. 



Chathamite, Shepard. A variety of 



Chloaiithite occurring in mica-slate, and 



generally associated with Mispickel, and 



sometimes with Copper Nickel, at Chatham, 



Connecticut, U.S. (See SAFFi.oparE). 



Analysis by Genth : 



Arsenic 



Sulphur 



Iron 



Cobalt . 



Nickel . 



70-11 

 4-78 



11-85 

 S-82 

 9-44 



100-00 

 Brit. Mus., Case 4. 

 Chaux Akseniatee, Haiiy. See Phar- 



MACOLITE. 



Chaux Arseniatee Axhydre, Dufre- 

 noy. See Kuhnite. 



Chaux Borates Sh^iceuse, Haily. See 

 Datholite. 



Chaux Carbon atee, Haiiy. See Cal- 



CITE. 



Chaux Carbonatee Concretionnee, 

 Haiiy. See Stalagmite. 



Chaux Carbonatee Ferrifere, Haiiy. 

 Bitter Spar coloured black by Bitumen, 

 and found crystallized in acute rhombohe- 

 drons in the Gypsum of Salzburg. 



Chaux Carbonatee Ferrifere Per- 

 lee, Haiiy. See Pea.rl-spar. 



Chaux Carbonatee Fetide, Haiiy 

 See Stinkstone. 



Chaux Carbonatee Magnesifere, 

 Haiiy. See Dolomite. 



Chaux Carbonatee Nacree, Haiiy. 

 See Slate-spar. 



Chaux Carbonatee Nacree Lamel- 

 laike, Haiiy. See Aphrite. 



Chaux Carbonatee Saccharoide, 

 Haiiy. See Granular Limestone. 



Chaux Carbonatee Spongieuse, Haiiy. 

 See Agaric Mineral. 



Chaux Datolit, Brochant. See Da- 

 tholite. 



Chaux Fluatee, Haiiy. See Fluor. 



Chaux Nitrate k, Haiiy. See Nitro- 



CALCITE. 



Chaux Phosphatee, Haiiy. See Apa- 

 tite. 



Chaux Phosphatee Verte, Haiiy. See 

 Asparagus -stone. 



Chaux Sulfate e, Haiiy. See Gyp- 

 sum. 



Chaux Sulfatee Anhydre, Haiiy. See 

 Anhydrite. 



Chaux Sulfatee Crystallisee, Haiiy. 

 See Selenite.- 



Chenocoprolite. Formerly called Ganse- 



