222 LITHOXYLON. 



Localities. Corn Avail, at Cook's Kitchen, 

 and Tincroft, near Redruth, in veins tra- 

 versing granite, also in St. Just. — Foreign. 

 Saxony, at Ehrenfriedersdorf, Altenberg, 

 Marienberg, Buchberge, near Rochlitz ; the 

 Harz. Planitz, near Zwickau ; in Bohemia. 

 Bavaria, &c. 



Name. From A/Ca?, stone, and marga, 

 marl. 



For varieties of Lithomai-ge, see Carnat, 

 Melopsite, Mycltn, Friable Litho- 

 MARGE, Wonder Earth, or Terra Mira- 

 culosa. 



Brit. Mus., Case 25. 



LiTHOXYLON (from >-''Sog, stone, and Z^Xov, 

 wood). See Wood Opal. 



Liver-coloured Copper Ore. See 

 Erubescite. 



Liver Ore of Mercury, or Liver 

 Stone. See Hepatic Cinnabar, 



LoBOiTE. A variety of Idocrase, from 

 Gokum, in Finland. 



Brit. Mus., Case 35. 



LoDSSTONE. The name given to Mag- 

 netic Iron-ore {Magnetite') when in a state 

 of magnetic polarity. It is met with in 

 masses in many beds of the ore in Siberia, 

 Elba, the Harz, the United States, at Mar- 

 shall's Island in Maine, and near Providence 

 in Rhode Island. See Magnetite. 



LcEWiTE, Beudant. A reddish trans- 

 parent mineral found associated with Bloe- 

 dite, at Ischl, in Austria. See Loveite. 



LoGANiTE, T. S. Hunt. A variety of 

 Pyrosclerite, occurring in short and thick 

 (usually small) crystals ; apparently oblique 

 rhombic prisms, replaced on the acute and 

 obtuse lateral edges, and on the acute solid 

 angles. Colour clove-brown to chocolate- 

 brown; sometimes pale. Lustre weak sub - 

 resinous. Subtransparent. Streak grevish. 

 Brittle. Fracture uneven. H. 3. S.G" 2 6. 



Comp., Hydrated silicate of magnesia 



and lime, or 2 (Al Ee) Si + 4(Mg3 Si) + 12H. 

 Analysis, by T. S. Hunt : 



Silica 32-84 



Alumina .... 13'37 

 Peroxide of iron . . . 3-00 

 Magnesia .... 35-12 



Lime 0-96 



Water and carbonic acid . 17-02 



101-31 

 BB loses colour and becomes greyish- 

 white, bu^t does not fuse. 



Locality. Calumet Island, on the Ottawa, 

 Canada, associated with Serpentine, Phlo- 

 gopite, Apatite, and Pyrites, in crystalline 

 limestone. 



LOVEITE. 



Name. After Sir William E. Logan, Di- 

 rector of the Geological Survey of Canada. 

 LoLiNGiTE, Haidinger. See Leucopy- 



RITE. 



The name Lolingite is derived from that 

 of one of its localities, Loling, near Hiitten- 

 berg, in Carinthia. 



LoMONiTE, Jameson. See Laumontite, 

 LoNCHiDiTE, Breithaupt. A variety of 

 Marcasite containing arsenic. Colour tin- 

 white ; sometimes with a greenish or grevish 

 tarnish. Streak black. H. 6-5. S.G.4-92to5. 



Comp. Fe S2 + (Fe S2 + Fe As)2, or mar- 

 casite 88-79 +mispickel 9-57 = 100. (Ram- 

 melsberg.) 



Analysis., from Cook's Kitchen, by Plattner : 

 Sulphur .... 49-61 



Iron 44-23 



Arsenic .... 4-40 



Cobalt 0-35 



Copper 0-75 



Lead 0-20 



99-54 

 Localities. Cook's Kitchen, Cornwall, in 

 small thin crystals, fig. 270, upon old speci- 

 mens of Blistered Copper Ore. Freiberg, and 

 Schneeberg, Saxony. 



Name. From AoV%»?, a spear. 

 Brit. Mus,, Case 6. 



LoPiioiTE, Breithaupt. A variety of Ri- 

 pidolite. S.G. 2-78 to 2-88. 



Analysis (mean of two), by v. Kobell ,- 



Silica 26-91 



Alumina .... 21-20 

 Magnesia . . . .23-86 

 Protoxide of iron . . . 15-16 

 Protoxide of manganese . 0-29 

 Water 12-00 



99-42 

 Locality. Zillerthal, in the Tyrol. 

 LoTALiTE. A greenish - grey mineral, 

 with a lamellar structure, and with deep 

 parallel striae, found at Peterlow, in Fin- 

 land, associated with red Felspar. 



Loveite ; Loweite. A yellowish-white 

 or reddish saline mineral, approaching As- 

 trakanite. Lustre vitreous. Taste slightly 

 saline. H. 2-5 to 3. S.G, 2-376. 



Comp. MgS + ]sraS + 2iH. 



