PRISMATIC HABROXEME. 



Prismatic Habroneme Malachite, 

 Mohs. See Phosphochalcite. 



Prismatic Halbaryte, 31ohs. See Ba- 

 rytes. 



Prismatic Iron Mica, Mohs. See Vi- 



VIANITE. 



Prismatic Iron Ore, Mohs. (In part) 

 Limonite. 



Prismatic Iron Pyrites, Mohs. Se'e 

 Marcasite. 



Pri s:\iATic KouPHONE Spar, 3Iohs. See 

 XatroIite. 



Prismatic Lime Haloid, 3Iohs. See 

 Aragonite. 



Prismatic Ltrocone Malachite, 3Iohs. 

 See Liroconite. 



Prismatic Manganese Blende, Jame- 

 son. See Manganese Blende. 



Prismatic Manganese Ore, Jameson. 

 See Pyrolusite. 



Pris:matic Melane Glance, 3Iohs, Brit- 

 tle silver ore. See Stephanite, 



Prismatic Mica. The name given to 

 the variety of Mica having a diagonal 

 cleavage. 



Prismatic Monoclase Haloid, Mohs. 

 See HoPEiTE. 



Prismatic Natron Salt, Mohs. See 

 Natron. 



PRIS3IATIC Nephrite Spar, Haidinger. 

 See Saussurite. 



Prismatic Nickel Pyrites, 3Iohs. See 

 Copper-nickel. 



Prisjmatic Nitre Salt, Mohs. See 

 Nitre. 



Prismatic Olive Malachite, 3Iohs. 

 See Olivenite. 



Prismatic Orthoclase Haloid, Mohs. 

 See Anhydrite. 



Prismatic Petaline Spar, Mohs. See 

 Petalite. 



Prismatic Purple Blende, 3Iohs. See 

 Kermesite. 



Prismatic Pyra^hdal Garnet, 3Iohs. 

 See Idocrase. 



Prismatic Quartz, 3Iohs. See Iolite. 



Prismatic Retin Baryte, 3Iohs. See 

 Triplite. 



Prismatic Scheelerz, or Scheele Ore, 

 3Iohs. See Wolfram. 



Prismatic Schiller Spar, 3Iohs. See 



AnTHOPH y ELITE . 



Prismatic Sulphur, 3Iohs. See Na- 

 Trv^E Sulphur. 



Prismatic Talc Mica, 3Iohs. See Chlo- 

 rite. 



Prismatic Tantalum Ore, 3Iohs. See 

 Tantalite. 



PROSOPITE. 301 



] Prismatic Titanium Ore, 3Iohs. See 

 I Sphene. 



Prismatic Topaz, 3Iohs. See Topaz. 

 Prismatic Triphane Spar, 3Ibhs. See 

 Spodumene. 



Prismatic Vitriol Salt, 3Iohs. See 

 Goslarite. 



Prismatic White Antimony^ Jameson. 

 See Cervantite & Valentinite. 



Prismatic Zinc Baryte, 3Iohs. See 

 Smith soNiTE. 

 Prismatic Zinc-ore, Mohs. See Zin- 



CITE. 



Prismatoidal Antimony Glance, J/oAs. 

 See Stibnite. 



Prismatoidal Garnet, 3Iohs. See 

 Staurolite. 



Prismatoidal Hal Baryte, 3Iohs. See 

 Celestine. 



Prismatoidal Kouphone Spar, 3Iohs. 

 See Stilbite. 



Prismatoidal Lead Baryte, Mohs. See 

 Lanahkite. 



Prismatoidal Manganese Ore, 3Iohs. 

 See Manganite. 



Prismatoidal Schiller Spar, 3Iohs. 

 See Hy'persthene. 



Prismatoidal Sulphur, Mohs. See 

 Orpiment. 



Prosopite, Scheerer. Colourless to 

 white. Lustre vitreous. Subtransparent. 

 Occurs in pseudomorphous crystals, some of 

 which are converted into Kaolin, while 

 others consist of violet Fluor, and others of 

 Fluor only partially kaolinised. H. 4*5. 

 S.G. 2-89 to 2-898. 



This mineral has been supposed by 

 Scheerer to be a Kaolin pseudomorpb homoeo- 

 morphous with Heavy Spar; and more re- 

 cently, by Dana, an altered form of Datho- 

 lite, in which fluorine has been introduced 

 through the process of alteration. 



The following formula and analysis by 

 Scheerer explain its composition : 



Formula. CaF,SiF3 ■> . ... .^ ^^ 



CaF,AlF3j +4CaAl + (H)Al 



Analysis : "^ 



Alumina .... 42-68 



Lime 22-98 



Fluoride of silicon . . 10*71 

 Protoxide of manganese . O'Sl 

 Magnesia . . • • 0'25 



Potash 015 



Water l^-oO 



92-58 

 Locality. The tin mines of Altenberg. 



