STILPNOSIDERITE. 



364 



Comp. Fe3 Si^ + Aljsi^ + 7H = silica 46*5, 1 

 alumina 8'5, protoxide of iron 36-0, water 

 9 = 100. 



Analysis, by Rammelsherg : 



Silica ..... 45-02 

 Alumina .... 6*75 

 Protoxide of iron . . 36-04 



Magnesia . . . ,2-89 



Lime 0-52 



Potash, with a trace of soda . 0*75 

 Water 7-96 



99-43 



JBB fuses with difficulty to a black shining 



globule : with borax dissolves completely, 



and gives an iron reaction ; and Avith micro- 



• cosmic salt, with separation of a siliceous 



jelly. 



Only partially soluble in warm and con- 

 centrated muriatic acid. 



Locality. Zuckmantel, in Austrian Silesia, 

 in clay-slate, with Calc Spar and Quartz. 



Name. From a-r'tX^w?^ shining, and f^i>^ot.ij 

 black. 



Brit. Mus,, Case 26. 



Stilpnosiderite, Ullmann. A hydrated 

 peroxide of iron, refei-red by Ullmann to 

 Limonite, and by Von Kobell to Gothite. 

 It occurs massive, or in stalactitic, botryoidal 

 and dendritic forms. Colour i)itch-black to 

 blackish-brown. Opaque. Lustre splendent. 

 Streak j'ellowish-bi-own. Brittle. Fracture 

 conchoidal. H. 4-5 to 5. S.G. 3-6 to 3-8. 

 Analysis, from Amberg, by v. Kobell : 

 Peroxide of iron . . . 86-24 

 Silica ..... 2-00 

 Phosphoric acid . . . 1-08 

 Water 10-68 



100-00 



BB infusible, but turns black. 



Localities. — English. Tincroft, in Corn- 

 wall. — Foreign. Scheibenberg and Rashau, 

 in Saxony. Thuringia. The Harz. Nassau. 

 Amberg, in Bavaria. Siegen, in Prussia. 



Name. From irTiK'Tto;, sJiining, and <n'^yie,o;, 

 iron. 



Stinkstein, Werner.^ The name given 



Stinkstone, Jame- >to those varieties 

 son. J of limestone Avhich 



give off a fetid odour when rubbed or struck 

 with a hammer. 



Amongst other localities it is met with at 

 Matlock, in Derbyshire ; near Clifton, in 

 the mountain limestone on the banks of the 

 Avon ; near Sunderland ; and in the isles of 

 Purbeck and Portland, in limestones of the 

 Purbeck and Portland beds. In the latter 

 localities, where the limestones in question 



STRAKONITZITE. 



are used as a road material, a very strong 

 odour is frequently perceptible when the 

 stones are crushed by a heavy vehicle passing 

 over them. 

 " Swinestone, when scraped or pounded, offen- 

 sive 

 Smells from rank petroleum's fossil oil, 

 And yet the smell is not the same, but more 

 Like bluejohn newly broke ; and in swine- 

 stone 

 Bitumen is not always found, that can 

 From distillation be obtain'd ; from whence 

 We safely may conclude the swinish smell, 

 Most fcfitid, to some other cause is owed." * 



Brit. Mus., Case 48. 



M. P. G. Upper Gallery, Table-case B, 

 in Recess 6, Nos. 197, 207. 



Stinkzinnobe-R Leberehz, Hammann. 

 See Cinnabar. 



Stolpenite, Kenngott. The Bole of Stol- 

 pen, in Saxony. 



Stolzite, Haidinger. Tungstate of lead. 

 Named after Dr. Stolz, of Teplitz. See 

 Scheeletine.. 



Stone. A miner's name in Derbyshire 

 for Ironstone. 



Stone-butter. See Steinbutter. 



Stone Coal. See Anthracite. 



Stone Salt, Jameson. See Rock Salt. 



Stony Coal. The name given by Berger 

 to bituminous Kimmeridge Shale. 



Stony Comfits. See Dkagees de Ti- 



VOLI. 



Stony Icicle, Woodward. Stalactite 

 (which see). 



Strahl Schorl, Werner. Crystallized 

 common Actinolite. 



Strahlenkdpfer, Strahlerz, Allan, 

 Hoffmann, Wernen Arseniate of Copper. 

 See Aphanesite. 



Strahlkies, Werner. See Radiated 

 Pyrites. 

 Strahlstein, Werner. See Actinolite. 

 Strahlzeolith, Werner. SeeSriLBiTE. 

 Strakonitzite, v. Zepharovich. A yel- 

 lowish-green steatite-like mineral, found in 

 pseudomorphous crystals, at Mutenitz, near 

 Strakonitz, in Bohemia. It is soft, feels 

 greasy, and yields a pale yellowish powder, 

 wliich becomes of a dull brown colour on 

 being heated. S.G. 1-91. 

 Analysis, by v. Zepharovich : 



Silica 53-42 



Alumina . . . . 7 00 

 Protoxide of iron . . 15*41 



Lime 1-37 



Magnesia .... 2-94 

 Water .... 19-86 



100 00 



* Werneria, by Terrae Filius. 



