274 parisite; 



■with dihedral summits. Colour paler than 

 Hornblende; generally olive- or bottle- 

 green. Somewhat translucent. Lustre 

 vitreous or pearly. Harder than Fluor, but 

 softer than Quartz. S.G. 311. 



Fig. 321. 



Analysis, from Pargas, by Bonsdorff : 



Silica 45-69 



Alumina .... 12-18 

 Magnesia .... 18-79 



Lime 13-83 



Protoxide of iron . . . 7-32 

 Protoxide of manganese . 0-22 

 Hydrofluoric acid . . 1-50 



99-53 



BB like Hornblende, but yields a paler 

 glass. 



Locality. Pargas (whence the name), 

 near Abo in Finland ; in Calc Spar. 



Brit. Mus., Case 33. 



The name Pargasite is applied to certain 

 varieties of Hornblende of high lustre and 

 rather dark tints of green, but paler than 

 common Hornblende. . The crystals are 

 generally thick and short. 



Parisite, L. di Medici- Spada. Hexa- 

 gonal. Occurs in elongated double six- 

 sided pyramids, with truncated apex and 

 very perfect basal cleavage. Colour green- 

 ish- or browish-yellow with a tinge of I'ed. 

 Lustre vitreous ; pearly on cleavage planes. 

 Translucent at the edges ; transparent in 

 thin laminjB. Streak yellowish-white. 

 Tracture slightly conchoid al. H. 4-5. S.G. 

 4-35. 



Comp. 8(Ce, La, D, Ca) C + (Ce, La, D) 



H + 2CaF. 



Analysis, by Bunsen (mean of two) : 

 Protoxides of cerium, lan- 

 thanum and didymium . 59-85 

 Carbonic acid . . . 23-58 



Lime 3-16 



Fluoride of calcium . .11-02 

 Water 2-40 



100-01 



BB infusible and incandescent ; but turns 

 brown. 



Difficultly soluble in muriatic acid with 

 effervescence. 



Locality. Emerald mines of the Musso 

 Valley, New Granada. 



Name. In honour of the discoverer, J. J. 

 Paris. 



PEA-IROM ORE. 



Brit. Mus.. Case 49. * 



M.P.G. Horse-shoe Case, Nos. 839—843. 



Parrot-Coal. A Scotch term for Can- 

 nel Coal, from the loud crackling noise with 

 which it flies to pieces when placed upon 

 the fire. Chance Pit, Borrowstownness, Lin- 

 lithgowshire. The Great Clyde Coal-field. 



Partschin, Haidinger. Partschine, 

 Dufrenoy. Found in reddish-brown grains 

 in small cubical crystals hke Monazite, in 

 sand at Olahpian in Hungary. H. 6 to 6-5. 

 S.G. 4 to 4-1. 



Fig. 322. 



Name. After the late Professor Paul 

 Partsch, of the Vienna Museum. 



Partschite, C. U. Shepard. A mineral 

 forming 1-05 per cent, of the meteorite of 

 Seneca River, Cayuga co.. New York, U.S. 

 Occurs in four-sided oblique prisms with 

 dihedral summits. Colour silver-white or 

 with a tinge of reddish-grey. Streak dark 

 grey. Brittle. Magnetic. H. 5-6. 



Contains iron, nickel, magnesium and 

 phosphorus. 



Soluble, when powdered, in aqua-regia. 



Name. After Professor Paul Partsch, of 

 Vienna. 



Passauite. a variety of Porcelain 

 Earth formed by the decomposition of 

 Porcelain Spar at Obernzell, near Passau, in 

 Bavaria. 



Pateraite. Haidinger's name for a 

 sulphide of molybdena composed of Mo S^. 



Patrinite. See Aikenite. 



Paulitk, Werner. Hypersthene from the 

 island of St. Paul, on the coast of Labrador. 

 S.G. 3-389. 



Brit. Mus., Case 34. 



Peacock Copper. The name given, in 

 Cornwall, to massive Copper Pyrites ( Chal- 

 copyrite') when covered with an iridescent 

 tarnish. The finest specimens are obtained 

 at East Crinnis, and other mines in the- 

 neighbourhood of St. Austell. 



Peacock-Coal. The name given to 

 Coals which display iridescent colours. 



Pea-Iron Ore. Bog Iron-ore when oc- 

 curring in small globular concretions. This 

 variety is met with in Anglesea ; at Tre- 

 madoc, Caernarvonshire; Galston, Ayr- 

 shire ; Clonmore, Mayo, &c. 



Brit. Mus., Case 16. 



