174 HEMATITE. 



The several varieties of iron-ore com- 

 prised in the species of Hematite, are 

 described under their respective names. 

 Specular Iron inchides the specimens pos- 

 sessing a perfect metallic lustre, and is called 

 Micaceous Iron when the structure is mica- 

 ceous : Red Hematite, Fibrous Red Iron-ore, 

 include the varieties with a sub- metallic or 

 non-metallic lustre, which if soft and earthy 

 are termed Red Ochre, Reddle, or Red Chalk, 

 and when consisting of slightly coherent 

 scales, Scaly Red Iron-ore , or Red- Iron Froth. 



There are very remarkable deposits of 

 Hematite in Mis'souri, ninety miles south 

 of St. Louis, Avhich are thus described by 

 Dana: "The Iron Mountain is 300 feet in 

 height, and consists wholly of massive per- 

 oxyd of iron lying in loose blocks, which 

 are largest about the summit, many 10 to 

 20 tons in weight. The Pilot Knob is esti- 

 mated by J. I). Whitney at 650 feet in 

 height; it is made up of a quartzose rock 

 of the azoic period, and is capped with 

 specular iron, which has the appearance of 

 stratification, and is micaceous in structure." 

 Dana's Mineralogy, vol. ii. p. 1 14. 



Hematite is sometimes hard enough to 

 take a verj' fine polish, and is then used 

 for polishing glass, gold, steel, and, in fact, 

 nearly all metals: it also possesses the 

 valuable property of laying on metals gold- 

 and silver-leaf, without fraying, tearing, or 

 detaching them. The highly-esteemed bur- 

 nishers of gilders, goldsmiths, gunsmiths, 

 and cutlers are made of Hematite, strongly 

 fastened in wooden handles, guarded by a 

 ring. The Hematite suited for this pur- 

 pose is of a very dark red colour, and should 

 have a fine grain, free from the slightest 

 cracks, and above all should be susceptible 

 of a high polish. Gallicia in Spain is the 

 chief locality whence this description is ob- 

 tained; and the people of Compostella, who 

 specially devote themselves to the search 

 for it, supply nearW the whole of Europe. 



Reduced to powder Hematite is used for 

 polishing tin, silver, and gold; and also as 

 a colouring material. 



Name. The name Haematite is derived 

 from oii'A«''5t, 6/000?. " And the Ha3matites or 

 Blood-stone, which is of a dense, soUd tex- 

 ture, dry, or, according to its name, seeming 

 as if formed of concreted blood."' — Theo- 

 phrastus, chap. Ixvi. Five varieties of 

 Haematite were known to the ancients, of 

 which the most esteemed, and probably 

 that referred to above, was obtained from 

 Ethiopia. 



Brit. Mus., Cases 14 and 16. 



M. P. G. A. 50 in Hall ; Boulder from 



HEPATIC PYRITES. 



New Red Sandstone, Porlock, Somerset- 

 shire. 



Principal Floor, Wall-cases 18 and 19 

 (Foreign) ; 32 and 48 (British). 



Hemimorphite. Siliceous zinc ore. 



Hemi-prismatic Augite Spar, Mohs. 

 See Hornblende. 



Hemi-prismatic Brythine Salt, Mohs. 

 See Glaubkrite. 



Hemi-prismatic Chrysolite, Mohs. 

 See Chondkodite. 



Hemi-prismatic Dystome- malachite, 

 Mohs. See Phosphochalcite. 



Hemi-prismatic Euclas Haloid, Hai- 

 dinger. See Pharmacolite. 



Hemi-pyramidal Felspar, Haidinger. 

 See Edingtonite. 



Hemi-prismatic Fluor-haloid, Hai- 

 dinger. See VVagnerite. 



Hemi-prismatic Gypsum -haloid, Hai- 

 dinger. See Pharmacolite. 



Hemi - prismatic H abroneme - mala- 

 chite, Mohs. See Malachite. 



Hemi-prismatic Hal - baryte, 3Iohs. 

 See Hayesine. 



Hemi-prismatic KouPHONE-spARjJfoAs. 

 See Heulandite. 



PIemi-prismatic Lead -baryte, Mohs. 

 See Crocoisite. 



Hemi-prismatic Natron-salt, Mohs. 

 See Trona. 



Hemi - prismatic Olive - malachite, 

 Mohs. See Vauquelinite. 



Hemi-prismatic Ruby-blende. Mohs. 

 See Miargyrite. 



Hemi-prismatic Schiller-spar, Mohs. 

 See Bronzite. 



Hemi-prismatic Sulphur, Mohs. See 

 Realgar. 



Hemi-prismatic Talc- mica, iJfoAs. See 

 Mica — (including Lepidolite). 



Hemi-prismatic Titanium Ore, Mohs. 

 See Sphene. 



Hemi-prismatic Vitriol-salt, 3Iohs. 

 See Copperas. 



Hemi-prismatic Zeolite. See Heu- 

 landite. 



H EN K ELITE. See Silver Glance. 



Hepatic Blende. See Leber -blende^ 



Hepatic Cinnabar, Phillips. A mix- 

 ture of Cinnabar, with Idrialite, carbon and 

 earthy matter. It occurs both compact and 

 slaty, of a dark red colour, sometimes al- 

 most iron-black. Opaque. Streak brownish- 

 red. ' S.G. 6-8 to 7-3. See Corallinerz. 



Locality. Idria in Carniola. 



Brit. Mus., Case 9. 



Hepatic Mercurial Ore, Kirwan, See 

 Cinnabar. 



Hepatic Pyrites, Kirwan^ Jameson. 



