BERZELIA^ITE. 

 Nertschinsk, and in the Uralian and Altai 

 mountains. Limoges in France ; Finbo and 

 Broddbo in Sweden ; Pfitscher Joch in the 

 Tyrol. Bodenmais and Rabenstein in Ba- 

 varia; the island of Elba; the mines of 

 Schlackenwald ; Australia and the East 

 Indies. 



Beryls of gigantic dimensions have been 

 found in the United States, at Acvvorth 

 and Grafton, N.H., and Royalston, Mass. 

 One Beryl from Grafton, KH., weighs 2900 

 lbs. ; it is 32 inches through in one direc- 

 tion and 22 in another, transverse, and is 4 

 feet 3 inches long. Another crystal from 

 this localit}', according to Prof. Hubbard, 

 measures 45 inches by 24 in its diameters, 

 and a single foot in length ; by calculation 

 it weighs 1076 lbs. At Royalston one crystal 

 exceeded a foot in length. A gigantic 

 opaque Beryl from North America, unfit for 

 jewelry, weighing 80 lbs., was in the Great 

 Exhibition of 1851. There is also one of 

 about the same size, but of more perfect 

 form, in the British Museum. It is also 

 found in Siberia, Hindostan and Brazil. 



In Mr. Turner's collection there is a crys- 

 tal of Beryl, exhibiting decided opalescence, 

 and showing a six-rayed star like some va- 

 rieties of Coi'undum. 



The name is derived from the Persian 

 helur, changed by the Romans into beryllus. 



Brit. Mus., Case 37. 



M.P.G. Horse-shoe Case, Nos. 810 to 817, 

 523, 825. 



Berzelianite, or Selenite of Copper. Oc- 

 curs in thin dendritic crusts, having an im- 

 palpable composition. Colour silver-white, 

 with a metallic lustre, and a shining streak. 

 Soft, and when rubbed down and polished, 

 assumes the colour of tin. 



Comp. -G-u Se = Selenium 38*4, copper 61-6. 



BB emits fumes of Selenium, and fuses to a 

 grey bead, which is slightly malleable. With 

 soda, slowly reduced. 



This mineral is generally found in minute 

 seams traversing Calc-spar, or as dendritic 

 delineations of a black colour, owing to the 

 decomposition it undergoes from exposure 

 to the air. It comes from the copper mine 

 of Scrickerum, in Smaland, Sweden, and 

 near Lehrbach in the Harz. 



Berzeliit, Kuhn. See Kuhnite. 



Berzelin, Nccker. See Haijyne, 



Berzeline. The name given by Beudant 

 to Selenide of Copper. See Berzelianite. 



Berzeline, Necher, Phillips. A mineral 

 near Leucite in composition, found in Pepe- 

 rino at Monte Albano and San Marino 

 near Rome; and also at Galloro, -near La 

 "Riccia, in the drusy cavities of an augitic 



BEUDANTITE. 41 



rock. It occurs in extremely minute white 

 octahedrons and cubo-octahedrons, as well 

 as in twin crystals, the faces of Avhich are 

 often uneven and rounded, and dull super- 

 ficially: also massive. It is colourless, 

 white or grey, with a vitreous lustre, and is 

 slightly translucent and very brittle. H. 5. 

 S.G. 2-727, to 2-428. 



BB in the forceps, fuses with difiiculty to a 

 pale glass. 



With heated muriatic acid forms a green- 

 ish jelly. 



Name. After Berzelius, the Swedish 

 chemist. 



Brit. Mus., Case 4. 



Beudanite, CovelU. See Nepheline. 



Beudantite, occurs in aggregations of 

 small shghtly obtuse rhombs, with the sum- 

 mits truncated. Colours black and brown. 

 Opaque. Translucent in thin fragments, 

 and of a deep brown colour by transmitted 

 light. Lustre resinous, streak greenish- 

 grey. H. 4 to 4-5. S.G. 4-295. 



Comp. 2Pb S + Ee S + Ee3 P + 9H or 



2Pb5 P+ EeS P + 9Ee S + 27H. 

 Analysis by Dr. John Percy . 



Arsenic acid 



. 9-68 



Phosphoric acid . 



. 1-46 



Silica . 



. 12-31 



Peroxide of iron . 



. 42-46 



Oxide of lead 



. 24-47 



Water . 



. 8-49 



98-19 



BB infusible, but gives off odours of sul- 

 phurous acid, and deposits a yellow coating 

 on the charcoal. With fluxes gives the reac- 

 tion of iron and some copper. 



Muriatic acid attacks the powder slowly 

 when boiled, forming a reddish-yellow solu- 

 tion. 



Beudantite has been referred to Pharma- 

 cosiderite (Cube Ore), but the above analy- 

 sis shows that it must be a distinct mineral. 



Localities. Associated Avith Brown Iron- 

 ore at Horrhausen and Montabaur (Dern- 

 bach) in the district of Nassau, on the 

 Rhine ; also found by Dr. Krantz, in 1856, 

 at the Glendore iron mine near Cork. The 

 crystals from this locality are small but very 

 brilliant and distinct, resembling Pharma- 

 cosiderite of a brown colour and translucent. 

 The crystals from Dernbach and Cork con- 

 tain little or no arsenic, while in those from 

 Horrhausen arsenic acid almost entirely 

 replaces the phosphoric. 



Name. After Beudant, the French mine- 

 ralogist. 



