Oryetogao- pearly lustre. Hardness=4.5, 5.5. 



'! 3.0, 3.2. 



"V^ External Charactert. Colour green. Occurs massive 



and disseminated. Internally shining, glistening, and 

 pearly. Fragments indeterminate angular, and rather 

 harp- edged. Translucent on the edges, sometimes 

 passing into translucent. Brittle. 



Chemical Characters It melts before the blowpipe 



into a grey or greenish enamel. 



Constituent Partt. Silica . 50.0 



Alumina 11.0 



Magnesia . 6.0 

 Lime . 13.0 



Oxide of iron 5.3 

 Oxide of Copper 1.5 

 Oxide of Chrome 7.5 9*-S 

 I'auijiielin, An. d. Chimis, No. 88. 

 Geoanoitic and Geographic Situation*. It occurs 

 in the Island of Corsica, along with Saussurite ; and 

 with the same mineral in Mont Rosa in Switzerland, 

 and at La Rivera, in the Valley of Susa in Piedmont. 



Vie*. The compound of green diallage and Saussu- 

 rite, named Gabbro by the Italians, Euphotide by the 

 French, and by artists Verde di Cortica duro, when cut 

 and polished has a beautiful appearance, and is much 

 prized as an ornamental stone. It is cut into snuff- 

 boxes, ring-stones, for in-laid work and other similar 

 purposes. 



aiT 2. SLATY SCHILLER-SPAR, Jameson Schiefcr Shiller- 

 Spath, Mohs. 



Prism nearly 100. Cleavage prismatoidal. Metallic- 

 like pearly lustre. Hardness=4.0, 5.0. Sp. gravity = 

 J.O, 3.3 



This species contains two subspecies, viz. Bronzite 

 and Common schiller spar. 



FIRST SUBSPECIES. 



mite. BRONZITE, Jameson. Blattriger Anthophyllit, Jf'cr- 

 ner. Diallage metalloide fibro-laminaire, Ilaiiy. 



External Characters Colours brown and grey. Oc- 

 curs massive, and in coarse and small granular distinct 

 concretions. Internally shining, and the lustre is 

 metallic-pearly. Fragments indeterminate angular and 



MINERALOGY. 



Sp. gravity^ 



525 



Geo^nostic and Geographic Situations. It occurs im- Oryctogn*. 

 bedded in serpentine, in Fetlar, and Unst in Shetland, ^y- ^, 

 and at Portsoy in Banffshire ; in the greenstone rocks of 

 the island of Skye ; also in the greenstone rocks of 

 Fifeshire; in the porphyritic rock of the Calton Hill, 

 and the trap-rocks of Craig Lockhart, near Edinburgh 



S. LABRADOR SCHILLER-SPAR, or HYPERSTENE. Hyper. 

 Jameson Labradorbche Schiller- Spath, Mohs. Hy- stene. 

 pestene, Haiiy. 



Prism nearly 100. Cleavage prismatoidal. Metal- 

 lic like pearly lustre. Hardness = 6.0. Sp. gravity = 

 3.3, 3.4. 



External Cluiractcrs Its colour is intermediate be- 

 tween greyish and greenish black, nearly copper-red 

 on the cleavage, and brownish-black, or blackish-brown 

 on the fracture surface. Occurs massive, disseminated, 

 also in thin curved lamellar concretions, which are col- 

 lected into coarse granular. On the cleavage, the 

 lustre shining and glistening, and metallic-pearly, on 

 the fracture glimmering and pearly. Fragments inde- 

 terminate, angular, or rhomboidal. Opaque, feebly 

 translucent on the edges. Greenish-grey in the streak. 

 Brittle, rather easily frangible. 



Chemical Cliaracter. It is infusible before the blow- 

 pipe. 



Constituent Partt. Silica, . 54.25 



Magnesia, . 1 4.00 

 Alumina, . 2.25 



Lime, . 1 .50 



Oxide of Iron, 24.50 

 Water, . 1.00 



Oxide of Manga- 97.50 



nese, a trace. 



Klaproth, Beit. b. v. a. 40. 



Geognoslic and Geographic Situations. It was first 

 discovered on the coast of Labrador, and afterwards in 

 the island of Skye, and near to Portsoy. 



Vttt. When cut and polished, it has a beautiful 

 copper-red colour, and metallic pearly lustre, and is 

 made into ring-stones and brooches. 



* STRAIGHT SCHILLER-SPAR, or ANTHOPHYLLITE , Antho- 



blunt-edged. " Traiulucent on the edges, sometimes Ja " t "0"-~ Geradcr Schiller-Spath, Mohs. Anthophyl- phyllitc. 

 approaching to translucent. Affords white streak. tt 01 ' Mumac/ier. Strahliger Anthophyllit, Werner. 



Difficultly frangible. 



Chemical Character!. It is infusible before the 

 blowpipe. 



Constituent Parlt. Silica, . 60.00 



Magnesia 27.50 



Iron . 10.50 



Water 0.50 98.50 prismatic distinct concretions, which are scopiform or 



Klaproth, Beit. b. v. s. 34. promiscuous, and in which the surface is streaked. 

 Geognottic and Geographic Situation* It occurs in 

 greenstone in the ulaml of Skye ; in large masses in a 



Prism nearly 106. Cleavage in the direction of A 

 rectangular prism. The lustre nearly metallic pearly. 

 Hardness = 5.0, 5.5. Sp. gravity = 3.0, 3.3. 



Kiternal Character*. Colour intermediate be- 

 tween dark yellowish-grey and clove-brown. It 

 generally occurs massive; also in narrow or broad 



bed of serpentine near Kraubat in Upper Stiria, &c. 



SECOND SUBSPECIES. 



COMMON SCHILLER-SPAR, Jameson Schillerstein, 

 Werner Diallage metalloide laminaire, Haiiy. 



External Characters. Colours green, grey, and brown- 

 Seldom occurs massive, generally disseminated, and 

 sometimes in granular distinct concretions. Internally 

 hining and splendent, the lustre pearly, or mttallic- 

 pearly. Fragments indeterminate angular or tabular. 

 Faintly translucent on the edges, or opaque. Streak 

 greenish-grey, and dull. Easily frangible, and slightly 

 inclining to sectile. 



Rarely crystallized, in reed-like, very oblique four-sided 

 prisms. Surface of the crystals longitudinally streaked. 

 Lustre shining and glistening, and metallic-pearly. 

 Fragments wedge-shaped and splintery ; and sometimes 

 rhomboidal. Translucent on the edges, or translucent. 

 Chemical Characters. It becomes dark greenish-black 

 before the blowpipe, but is infusible. 



Constituent Part*. Silica, . 5G.OO 



Alumina, . 13.30 

 Magnesia, . 14.00 

 Lime, . 3.33 



Iron, . 6.00 



Oxide of Manganese, 3.00 

 Water, . . 1.43 

 John, Chem. Untersuchungen, 1. s. 200, 201. 



ThU miner*! U named jtnlhaf^Olte, on account of the timuarity of ia colour with that of the acthopliyUum. 



