3G BAND JASPIS. 



isli or greenish-white, or bluish-green. 

 Translucent. Lustre silky. Fracture un- 

 even and splintery. H. 6 to 7. S. G. 2-984. 



Comp. A14 Si6, or alumina 42-4, silica 

 57-6 = 100. 



Analysis by Erdmann : 



Silica 56-90 



Alumina .... 40-73 



Peroxide of iron . . . 1-04 



Lime 1-04 



Fluorine .... trace 



99-71 

 BB infusible. ' 



Localities. Bamle (whence the name 

 Bmnlite) and Brakka in Norway, in gneiss. 



Band Jaspis, Werner. See Ribbon 

 Jasper. 



Baralite, Dana. Occurs massive and 

 cellular. Colour greenish- black. Opaque. 

 Lustre glimmering. Streak greyish-green. 

 H. 4. 



Comp. Silica, alumina, peroxide of iron, 

 lime, magnesia and water. 



BB alone infusible. Wholly soluble in 

 muriatic acid. 



Locality. B aralon. Cote- du - Nord ,'France. 



Bap.badobs Tar. See Petroleum. 



Barnhakdtitb. Occurs massive, of a 

 pale bronze-yellow colour, resembling that 

 of Pyrites, but with a less bright lustre. 

 Tarmshes readily to pinchbeck and iridescent 

 tints. Streak black, and slightly shining. 



Comp. 2CuS+Fe2S5. 



Analt/sishj Taylor. 



Sulphur .... 29-40 

 Copper .... 47-61 



Iron ..... 22-23 

 Silver ..... trace 



99-24 



BB gives off fumes of sulphur, and melts 

 to an iron-black magnetic globule. 



Localities. United States, in a mine 

 on the land of Dan Barnhard (whence the 

 name Barnhardtite), Cabarras co.. North 

 Carolina; near Pioneer Mills, and at the 

 Phoenix and Vanderberg mines, and near 

 Charlotte in Mecklenburg co. 



Barolite, Kirwan. Witherite ; the name 

 derived from /Sdcey?, heavy, and >^Woi, stone, has 

 reference to its high specific gravity. 



Baroselenite. The name used by Kir- 

 wan for Barytes ; derived from ^«§u?, heavy, 

 and Selenite, in allusion to its high specitic 

 gravity, and the resemblance some of its 

 crystals bear to those of Selenite. 



Brit. Mns., Case 52. 



BARYTE. 

 Barsowite, Brook 8f Miller. A Felspathic 

 mineral occurring in boulders in the auri- 

 ferous sand of Barsowkoi, near Kyschtimsk, 

 in the Ural, as the gangue of the blue Cor- 

 undum, It is found massive, of a snow- 

 white colour, and a more or less pearly lus- 

 tre. Texture granular, with a nearly per- 

 fect cleavage in one direction. Fracture 

 granular, or splintery. H. 5-5 to 6. S.G. 

 2-74 to 2-75. 



Comp. CaS si2+3 M Si = (Ca + Al) Si|. 



Analysis by Varrentrapp : 



Silica 49-01 



Alumina .... 33.85 

 Lime ..... 15-46 

 Magnesia .... 1-55 



99-87 

 BB alonp fuses to a vesicular glass at the 

 edges : with borax melts slowdy to a colour - 

 less glass. 



Gelatinises easily on being heated with 

 muriatic acid. 



Barystrontianite, Traill. The mineral 

 to which this name has been given is not 

 a distinct species, but a mechanical mix- 

 ture found at an old lead mine two miles 

 west of Stromness, on Pomona, or Mainland, 

 one of the Orkneys; and on the beach at 

 the Point of Ness. It occurs in yellowish- 

 white aggregations, with a dull pearly lustre. 

 It consists of 



Strontianite . . ■ . . 68-6 

 Barytes ..... 27-5 

 Carbonate of lime . . , 2*6 

 Oxide of iron . . .0-1 



100-0 



Baryta, Carbonate of. See Wither- 

 ite. 



Baryta, Bicalcareo-carbonate of. 

 See Alstonite and Bromlite. 



Baryta, Sulphate of. See Barytes. 



Baryta, Sulphato-Carbonate of. See 



SULPHATO -carbonate OF BaRYTA. 



Baryta Harmotome. See Harmo- 

 tome. 



Baryte Carbonates. See Witherite. 



Bary'te, Brooke Sf Miller. Baryte Sul- 

 fate i£, Haiiy. Barytes, Dana, Greg &,- 

 Leitsom, Phillips. Rhombic. Occurs mas- 

 sive and crystallized, with a lamellar 

 structure, which in the massive varieties 

 is sometimes curved; also fibrous or gra- 

 nular. Colourless, or inclining to yellowy 

 blue, red, grey, or brown. Transparent to 

 opaque, i^ustre vitreous, inclining to re- 

 sinous. Streak white. Possesses double 

 refraction when held in a particular direc- 



