RED HEMATITE. 



fications. Cleavage octahedral. Also in 

 granular, compact, or earthy masses. Colour 

 various shades of red, particularlj^ cochi- 

 neal-red; sometimes crimson-red by trans- 

 mitted light. Semi - transparent to sub- 

 translucent. Lustre submetallic, or adaman- 

 tine. Streak brownish - red and shining. 

 Yields easily to the knife. Brittle. Fracture 

 conchoidal, or uneven. H. 3*5 to 4. S.G. 

 5-6 to 6-15. 



Comp. Dioxide of copper, -^-u^ copper 

 88-9, oxygen 11-1 = 100. 



BB on charcoal, in the inner flame, 

 affords a globule of pure copper ; with borax 

 fusesi readily to a fine-green glass. 



Dissolves, with effervescence, in nitric acid. 



Localities. — English. Cornwall, in several 

 mines. South Francis, Huels Gorland, Pros- 

 per, Unity, Muttrell, Basset, Carnbrea. 

 Phoenix, Huel Crebor, Devonshire. Ecton 

 Mine, Staffordshire. — Foreign. Chessy, near 

 Lyons, in France, in isolated crystals, im- 

 bedded in Lithomarge, Linares, in Spain. 

 Moldawa, in the Bannat. Siberia, at Ka- 

 therinenburg, &c. Thuringia. Tuscany. 

 Cuba. iS^ew Jersey, Lake Superior Copper 

 region, and in many localities in North and 

 South America. South Australia. 



Brit. Mus., Case 17. 



M. P. G. A 56, in Hall ; mass of ore 

 from Burra Burra mines. South Australia. 

 Principal Floor, Case 11 (Burra Burra). 

 Wall -cases 1, 30, and 32 (British); 15 

 (Foreign) ; 37 (Burra Burra). 



See also Zigueline or Tile-ore, Chal- 

 COTRICHITE, and Plush Copper. 



Eed Hematite,"] Under these terms 

 Phillips. j are included those 



Red Iron-ore. V varieties of Hema- 



Red Iron -stone, [ tite Avhich have a 

 Jameson. j non - metallic or 



sub-metallic lustre; under the latter are 

 comprised the Red Iron Froth, Ochrey Red 

 Ironstone, Compact Red Ironstone, and Red 

 Hematite, of Jameson. 



Red Iron Chalk. An impure peroxide 

 of iron, used as a drawing material. It has 

 an earthy appearance and texture, and 

 breaks with a conchoidal fracture. See 

 Reddle. 



Red Iron Froth, Jameson. A variety 

 of Red Hematite, composed of friable or 

 slightly coherent scaly particles. It is 

 smelted at Sahl, in the Duchy of Henne- 

 berg, and yields good iron. 



Red Iron Ochre. See Red Ochre. 



Red Iron Vitriol. See Botryogene. 



Red Lead Spar, Kirwan. \ See 



Red Lead Ore, Jameson, j Crocoisite. 



] 



See 

 Diallogite. 



See 



See 



REDDLE. 815 



Red Manganese, Allan. 



Red Manganese Ore, 

 Jameson. 



Red Ochre. A soft and earthy form of 

 Hematite, or Peroxide of Iron. It occurs 

 abundantly at Davidstow, near Camelford, 

 in Cornwall ; Chew Magna, near Wrington, 

 in Somersetshire ; at Uiverstone, in Lanca- 

 shire, &c. 



Red Ore of Manganese, Kirwan. See 

 Diallogite. 



Red Orpiment, Jameson. See Realgar 



Red Oxide of Copper, Phillips. See 

 Red Copper. 



Red Oxide of Zinc, Phillips. 



ZiNCITE. 



Red Scaly Iron Ore, Kurwan. 

 Red Iron-froth. 



Red Silver Ore,"^ ^ 



Jameson. > -r, 



Red Silver, Phillips.^ P^rargyrite. 



Red Sulphuret of Arsenic. See 

 Realgar. 



Red Vitriol, Jameson. See Biebrite. 



Red Zeolite of J^^delfors. See 

 Retzite. 



Red Zinc Ore, Jameson. See Zincite. 



Reddle, Jameson ; or Red Iron-chalk. 

 An impure peroxide of iron, occurring in 

 opaque compact masses of various shades of 

 light brownish-red, which sometimes passes 

 into nearly brick-red. Soils the fingers, 

 and, when rubbed on paper, leaves a red 

 trace. Streak paler, more shining, and 

 brighter than the fractured surface. Easily 

 frangible. Fracture earthy and dull. Usually 

 dry and meagre to the touch. Adheres 

 strongly to the tongue. Gives off an argil- 

 laceous odour when breathed on. In water 

 falls to powder, and does not form a paste. 

 S.G. 3-14 to 3-93. 



Exposed to a red heat it decrepitates, and 

 becomes of a deeper red or blackish colour. 



Reddle is found abundantly in England, 

 France, and Germany. 



The term Reddle is generally applied in 

 this country to the kind which is used for 

 marking sheep, for which purpose it is pro- 

 cured in considerable quantities from the 

 Carboniferous Limestone of the Mendip 

 Hills, in Somersetshire, and the Forest of 

 Dean, in Gloucestershire; also at Wast- 

 Avater, in Cumberland {Red Iron Chalk). 

 It is prepared at Brixham and other places 

 in Devonshire, from the iron ores which 

 occur in the Devonian limestone of the west 

 of England, and is used for the coarser kinds 



