334 SAXOX TOPAZ. 



Felspar, from -which it is distinguished hy 

 greater hardness and by speciiie gravity, 

 which is much above that of the Felspars. 



Saxon Topaz. A pale wine-yellow 

 Topaz from Schueckenstein, in the Valley 

 of Dam berg. See Topaz. 



Saynite, v. Kohell. A name for Bismuth 

 Nickel, after the locality, Sayn-Alten- 

 kirchen. See Grunauite. 



ScACCHiTE. A combination of lead and 

 selenium, discovered b}^ IMons. Palmiere, the 

 meteorologist, in certain fumaroles of Vesu- 

 vius, and named by him after Prof. Scacchi 

 of Naples. 



Soale-Stone, Bakewell. See Lepido- 



LITE. 



Scaly Talc. See Nacrite. 



Scaly Triclasite. See Weissite 



ScAKBRoiTE, PkilUps. A clay - like 

 mineral related to Collyrite. Amorphous. 

 Colour pure white. Devoid of lustre. 

 Highly adhesive to moist surfaces. Easily 

 scratched with the knife. Can be polished 

 ^ with the nail. Gives off a strong argillace- 

 ous odour when breathed on. Immersed in 

 water, gains considerably in weight, but 

 neither becomes translucent, nor falls in 

 pieces. Fracture conchoidal. H. 2. S.G. 

 1-48. 



Comp. Hydrous silicate of alumina, or 



A15 Si + 15H. 



Analysis, by Vernon ; 



Silica 10-50 



Alumina .... 42-5() 



Peroxide of iron . . . 0*25 



Water 46-75 



10000 

 Locality. Near Scarborough*, in York- 

 shire, between septa of ironstone, in a cal- 

 careous rock. 



Brit. Mus., Case 26. 



ScAPOLiTE, Phillips, Nicol; or Scapolith, 

 Werner. Pyramidal. Occurs in four-sided 

 and eight-sided prisms, which are some- 

 times terminated by tetrahedral pyramids, 

 and often aggregated laterally into masses 

 composed of parallel (or somewhat diverg- 

 ing) or intermmgled groups. These when 

 broken often display a broad fibrous struc- 

 ture. Cleavnge parallel to the sides, terminal 

 planes, and both diagonals of a square 

 prism. Also massive, granular, or columnar. 

 Colours, white, grey, yellowish, blue, green, 

 or red; generally pale. Transparent or 

 translucent. Lustre vitreous or somewhat 



* Whence the name, Scarbroite. 



SCHEELBLEIERZ. 

 pearly, inclining to resinous; cleavage- 

 planes and fracture resinous. Streak white. 

 Brittle. Fracture sub-conchoidal. H. 5 to 

 b-b. S.G. 2-61 to 2-75. 



Comp. Ca Si + Al Si. 



Anab/sis, from Pargas, by Nordenski'dld : 



Silica 43-83 



Alumina .... 35-43 



Lime 18-96 



Water 1 03 



99-25 



BB fuses and swells up to a translucent 

 mass, which is no longer fusible. Dissolves 

 in borax or microcosmic salt, with continued 

 effervescence, forming a transparent glass. 



Perfectly decomposed by muriatic acid, 

 when finely pounded, without forming a 

 siliceous jelly ; (which serves to distin- 

 guish it from Meionite.) 



Localities. Norway : iron mines at Aren- 

 dal, in gneiss. Wermland, in Sweden. Par- 

 gas, in Finland. Akudlek, in Greenland. 

 Various parts of the United States. Grand 

 Calumet Island, Canada. 



Name, from (rya-To;^ a club, and xldc;, 

 stone ,- in allusion to the form of thecrvstals. 



Brit. Mus., Case 31. 



3L P. G. Horse-shoe Case, No. 967. 



Under the term Scapolite or Wernerite 

 are comprehended the common white and 

 greyish varieties. The crystals are some- 

 times rendered opaque externally by a 

 chalky deposit (the result of exposure), or 

 even throughout in consequence of a partial 

 alteration. The massive varieties bear some 

 resemble to the Felspars. 



For varieties of Scapolite, see Ekeber- 

 GiTE, Glaucolite, Nuttalite, Paran- 

 THiKE, Porcelain Spar. 



ScHAALSTEiN, Werner. See Wollas- 



TONITE. 



ScHABAziTE, Werner. See Chabazite. 



Schapbachite. a name for Bismuth 

 Silver, from the locality Schapbach, in 

 Baden. 



Schaum Earth. Jameson. 



ScHAUMERDE, Wei'ner. 



Schaumkalk. 



The term Schaumkalk also includes a 

 variety of Gypsum, composed of fine scales, 

 with a pearly lustre. 



Schaumartiger Wad-Graphit, Molis. 

 Earthy Manganese. See Wad. 



Scheelate of Iron and Manganese. 

 See Wolfram. 



ScHEELBLEiERZ, Naumann. Scheel- 



BLEISPATH. ScHEELSAUKEsBlEI. SCHEE- 



■} 



See 

 Aphrite. 



