38 BARYTO-CALCITE. 



ral the\' do not exceed half an inch to an 

 inch in length. The larger crystals are fre- 

 quently decomposed, and converted into a 

 ■white mealv-looking substance like Barytes. 



Brit. Mus., Case 41. 



BaPwYto-calcixe, Thojiison. See Leeds- 



ITE. 



Baryto-celestine, Thomson. The mine- 

 ral from Kingston and Sydenham, Canada 

 W,, so called by Thomson, is pure Celestine, 



Barytophyllit, Breithaupt. See Chlo- 



RITOID. 



Basalt -jasper, a name given to semi- 

 ritritied on porcellanic shales. 



Basaltine, the name given by Kirwan 

 to crystallized Hornblende, because it is 

 "mostly found in basalts and lava." 



Basanite. See Lydian Stone. 



Basanomelane, Kohell. Titaniferous 

 Iron ; according to Breithaupt, a variety of 

 Hystatite. 



Analysis from Gastein in Switzerland, by 

 V. Kobell : 



Protoxide of iron . , o'Ol 



Peroxide of iron . . . 85*33 

 Titanic acid . . , .9-66 



100-00 



Name. From ^aa-otvo?, touchstone, and 

 u-iXct;, black. 



Basic Flucerien. See Flucerine. 



Basicerine, Beuda?it. See Fluocerine. 



Basisches Schwefelsaures Eisen- 

 OXYD. See Copiapite. 



Bastite, Brooke §* Miller. A name given 

 to Schiller Spar from its occurrence at Baste 

 in the Harz. 



Batkachite, Breithaupt. A variety of 

 Chrysolite in which a great part of the Mag- 

 nesia is replaced by lime. (Ca^ Mg2) Si. It oc- 

 curs massive, exhibiting traces of a rhombic 

 prism. Colour pale greenish-grey to nearly 

 Avhite. Lustre resinous inclining to vitreous. 

 Streak white. Fracture small conchoidal. 

 H. 5. S.G. 3-03. 



BB infusible alone ; slowly soluble in salt 

 of phosphorus leaving a silica residue; with 

 soda fuses with difficulty to a dark-coloured 

 pearl. 



Not acted on by acids. 



Locality. Rinzoniberg, a mountain in 

 Southern Tyrol. 



Name. From ^xt^ocxo?, a frog, from its re- 

 semblance to the colour of that animal. 



Brit. Mus., Case 25. 



Bavalite, Dufrenoy. A silico-aluminate 

 of oolitic iron, analogous to the Chamoisite 

 and Eerthierine of Hayanges, but of a some- 



BEEKITE. 

 what deeper colour. It is found at Bavalon 

 (C6tes-du-Nord). 



Baudisserite. a name given to Mag- 

 nesite, from its occurrence at Baudissero in 

 Piedmont 



Baulite. a variety of Krablite, resem- 

 bling pitchstone and pearlstone ; formerly 

 ejected abundantly from the volcanoes of 

 Iceland and Faroe. Oc(;urs in globular 

 masses sometimes with a radiated and con- 

 centric fracture. S.G. 2-623. 



Soluble in muriatic acid. 



Name. After the mountain of Baula in 

 Iceland. 



Brit. Mus., Case 30. 



Beaume de Momie. See Asphalt. 

 The colour momie, made from Asphalt, re- 

 ceived its name from the circumstance of 

 the material being sometimes taken from 

 Egyptian mummies, that being supposed to 

 be of the finest quality. 



Beaujviontite. The minute crystals, sel- 

 dom exceeding a line in length, occurring 

 on syenite-schist with Haj'denite, at Jones's 

 Falls, near Baltimore, U. S., have been de- 

 scribed by Levy, under the name of Beau- 

 montite, as modified square prisms. Dana 

 has shown that the form cannot be a square 

 prism. In physical and other characters 

 the cr^'stals resemble Heulandite. S.G. 2-24. 

 An analysis by Delesse afforded 



Silica . 



. 64-2 



Alumina 



. 14 1 



Protoxide of iron . 



. 1-2 



Lime 



. 4-8 



Magnesia 



. 1-7 



Loss and soda 



. 0-6 



Water . . 



. 13-4 





100-0 



Name. After Elie de 



J3eaumont, Pro 



fessor of Geology at the Ecole des Mines, 

 Paris. 



Fig. 46. 



Beekite, Kengott, W. Pengelly. This is 

 not, strictlv speaking, a distinct mineral 

 species, but merely a particular form of Chal- 

 cedony deposited on fossils, either sponges, 

 corals, or shells — generally spiral univalves. 

 It occurs in New Bed Conglomerate in round- 

 ed masses, resembling the pebbles with 



