OSTRANITE. 



OsTRANlTE, Breithaupt. A Zircon of a 

 greyish- or clove - brown colour. Lustre 

 vitreous. Very brittle. 



Locality. Fredericksvarn, in Norway. 



Named after Ostera, the German goddess 

 of spring and morning. 



Brit. Mus., Case 26. 



-^^^ 



Fig. 320. 



OsTREOCOLLA. (From oW^sev, an oyster, 

 and y^oXXa, glue.) The name given to calca- 

 reous incrustations deposited on roots, twigs, 

 or small branches of trees, the vegetable 

 matter of which being eventually destroyed, 

 the lime is left in a tubular form, resembling 

 small bones. Hence the name OsteocoUa 

 (which see), and the vulgar belief in their 

 efficacy in uniting broken limbs. 



Ottrelite, Haiii/. Occurs in small shin- 

 ing scales, disseminated through clay-slate. 

 Colour greenish- or blackish-grey. Lustre 

 vitreous. Translucent. Streak pale green. 

 Scratches glass. S.G. 44. 



Camp. (Fe, Mn)3 Si + 2M Si + 3H. 



Anahjsis, by Damour : 



Silica 43-34 



Alumina .... 24-63 

 Protoxide of iron , . . 16-72 

 Protoxide of manganese . 8'18 

 Water 5-66 



98-53 



BB fuses with difficulty at the edges to a 

 black magnetic glass. 



Decomposed only by heated sulphuric acid. 



Localities. British. Ottrelite has been 

 found by Mr. Warington Smyth on Snow- 

 don and in the Isle of Man. 



JVaine. After the locality, Ottrez, a vil- 

 lage in Belgium, on the borders of Liege and 

 Luxembourg. 



OuTEEMER, Leymerie, Beudant. A name 

 for Lapis Lazuli, after that by which the 

 finer pulverised portions used by painters 

 are known in France. 



OuvAROviTE. See Uwarowite. 



OwENiTE, Genth. A mineral resembling 

 Thuringite, named after Dr. David Dale 

 Owen, U.S., geologist. Occurs massive, 

 as an aggregation of minute scales. Colour 

 olive-green. Lustre pearly. Streak paler 



OXIDE OF TUNGSTEN. 271 



than the colour. Very tough. Fracture sub- 

 conchoidal. Powder greasy to the touch. 

 Odour argillaceous. H. 2-5. S.G. 3-197. 



'Comp. 2R3 si + 3Pp Si + 6H. 

 OxACALCiTE, C. U. Shepard. See Whe- 



WELHTE. 



Oxalate of Iron, Phillips. See Oxa- 



LITE. 



Oxalate op Lime, H. T. Brooke. See 

 Whewellite and Thierschite. 



OxALiTE, Hnusmann. Occurs in capil- 

 lary crystals ; also botryoidal, fibrous, gran- 

 ular, or earthy. Colour yellow. Lustre dull. 

 Opaque. Slightly sectile. Fracture uneven, 

 earthy. H. 2. S.G. 2-13 to 2-5. 



Comp. 2Fe-G- + 3H = protoxide of iron 

 41-4, oxalic acid 42-7, water 16-1 = 100. 



BB on charcoal, yields a vegetable odour, 

 and becomes successively yellow, black, and 

 red. Forms a yellow solution without 

 eflFervescence in nitric aid. 



Localities. Kolosoruk, near Bilin, in 

 Bohemia, in Lignite. In Brown Coal, at 

 Gross Almerode, and Duisburg, in Hesse. 

 Potschappel, near Dresden. Cape Ipperwash, 

 Canada, in shales. 



OxHAVERiTE, Brev^ster. A pale-green 

 translucent variety of Apophyllite, found in- 

 distinctly crystallized on calcified wood, at 

 Oxhaver springs, in Iceland. 



Oxide of Antimony, Phillips. See Cer- 



VANTITE. 



Oxide of Antimony, Phillips. See Va- 



LENTINITE. 



Oxide of Arsenic, Phillips. See Arse - 



NOLITE. 



Oxide of .Bismuth, Phillips. See Bis- 

 muth Ochre. 



Oxide of Chrome, Phillips. See Chrome 

 Ochre. 



Oxide of Cobalt. See Earthy Cobalt. 



Oxide of Copper. See Chalcotrichite, 

 Melaconite, Red Copper, Tenorite. 



Oxide of Iron. See Bog-iron Ore, 

 GoTHiTE, Hematite, Lepidokrokite, Li- 

 MONiTE, Magnetite, Specular Iron, Stil- 

 nopsiderite, Turgite, Yellow Ochre. 



Oxide of Lead. See Mendipxte, Mi- 

 nium, Pl^TTNERITE, PlUMBIC OcHRE, 



Oxide of Manganese. See Braunite, 

 Hausmannite, Manganite, Psilomelanb, 

 Pyrolusite. 



Oxide of Molybdena, Phillips. See 

 Molybdine. 



Oxide of Nickel. See Annabergite. 



Oxide of Tin, Phillips. See Cassiterite. 



Oxide of Tungsten, Phillips. See Wol- 

 framine. 



