LITHOMARGE, 163 



Dull. Colour green, grey, white. Streak shining, 

 resinous. Feebly translucent on the edges ... 

 opake. 



Perfectly sectile. Feels very greasy. Adheres but 

 feebly or not at all to the tongue, and is very 

 soft. Sp. Gr. = 1-819, HOFFMANN; = 2-198, 

 BREITHAUPT. 



If thrown into water, it falls to pieces, and forms a paste 

 which is not plastic. It absorbs oil and fat. It is fonned 

 by the decomposition of certain rocks, as for instance at 

 Rosswein in Saxony, at Feistritz on the Bacher in Stiria ; 

 and probably also at Reifenstein and Rein in the same coun- 

 try, although in these two places the mode of its formation 

 is not so easily observed. It occurs also in Moravia, in 

 great quantities and very pure at Nutfield in Surry, and 

 other places in England, &c., and is use<J for cleansing 

 woollen cloth. 



LITHOMAEGE. 



Lithomarge. JAM. Syst. Vol. II. p. 74. Man. p. 311. 

 Lithomarge. PHILL. p. 52. 



Massive. Spheroidal. Composition impalpable. 



Fracture uneven, large and flat conchoidal in the 



large, fine earthy in the small. Sometimes the 



particles do not cohere, and are found in the 



shape of a fine scaly powder. 

 Colour white, pearl-grey, lavender-blue, flesh-red, 



ochre-yellow. Somewhat shining in the streak. 



Opake. 

 Sectile. Adheres strongly to the tongue, feels fine 



and greasy, and is soft, sometimes friable. Sp. Gr. 



= 2-435 ... 2-492, BREITHAUPT. 



