178 



PHYSIOGRAPHY. 



Edingtonite. 



EDINGTOiNITE. Pyramidal Dy stom e-Spar. 



Primary form. Right rectangular prism ? 

 Secondary form. 



Fig. 164. 



Cleavage, pretty distinct parallel to the primary faces. 

 In other directions a small and conchoidal fracture. Sur- 

 face^ M and T generally smooth, the rest curved and with- 

 out lustre. 



Lustre vitreous. Color greyish white. Semi-transpa- 

 rent, but oftener translucent. Streak white. 



Hardness =-4-0 . . . 4-5. Sp. gr. =2-71. 



1. It yields moisture when calcined. It is fusible before the blow- 

 pipe into a transparent glass. It gelatinizes in the acids. 



Silica 

 Alumina 

 Lime . 

 Water 



2. Analysis. 

 By TURNER. 



35-09 

 27-69 

 12-68 

 13-32 



3. It occurs at Kilpatrick near Dumbarton, (Scotland,) where it is 

 accompanied by Harmotome and Thomsonite, being implanted upon the 

 latter mineral in crystals, the largest of which is only two lines in diam- 

 eter. 



EKEBERGITE. (See Scapolite.) 

 ELAOLITE. (See Nepheline.) 



