BLOEDITE. 79 



Botryoidal, stalactitic, massive : composition impal- 

 pable. Fracture conchoidal ... very fine earthy. 



Colour blueish and brownish-black, blackish-brown. 

 Streak shining, even in friable varieties, with a 

 somewhat resinous lustre. Opake. 



Sectile. Soils but little. Soft, sometimes passing 

 into very soft. Sp. Gr. = 2-200, of the botryoidai 

 compound variety from Saalfeld, BREITHAUPT. 



Before the blowpipe it gives out an arsenical smell, and 

 colours borax smalt blue. It consists of the oxides of co- 

 balt and manganese. 



It occurs at Saalfeld, Kamsdorf, and Gliicksbrunn in 

 Thuringia ; at Riechelsdorf in Hessia, in the principality 

 of Furstenberg, in different mineral repositories, which also 

 contain several species of Cobalt-pyrites. It is used in the 

 fabrication of smalt. 



It seems that the yellow and the brown cobalt ochre are 

 in a close connexion with the black variety ; yet they all 

 require some farther examination. 



BLOEDITE. 



SALT. 



Bloedit. JOHN. Chem. Unters. V. S. 240. LEONH. p. 636. 



Massive : composition thin columnar. Fracture 



uneven, splintery. 

 Lustre faint, vitreous. Colour between flesh red 



and brick-red. Translucent, becoming opake 



and white by decomposition. 

 Soft. 



It occurs at Ischel in Upper Austria, along with pris- 

 matic Gypsum-haloide and the Polyhalite. It consists, ac- 

 cording to JOHN, of 



