MAGNESITE. 121 



globule, which contains a skeleton of silica, and becomes 

 opake on cooling. It occurs at Dalsnypen in Faroe, with 

 hemi-prismatic Kouphone-spar, in the vesicular cavities of 

 an amygdaloid. 



LIGUEITE. 



VIVIAXI. Mem. dell' Accad. delle Scienze, lettere ed 

 arti di Geneva. III. Ugurit. LEONHARD. S. 651. 

 Ligurite. PHILL. p. 207. 



Hemi-prismatic. y. P + oo = 140. Pr -f oo. 

 Inclination of y on Pr -f oo = 152 (nearly). 



Fracture uneven. 



Lustre of the fracture intermediate between vitre- 

 ous and resinous. Colour apple-green. Streak 

 greyish- white. Transparent ... translucent. 

 Hardness above 5-0. It is said to be harder than 

 oriental chrysolite. Sp. Gr. = 3-49. 



According to VIVIANI, who gave the preceding descrip- 

 tion of this mineral, it consists of 



Silica 57-45. 



Alumina 7*36. 



Lime 25-30. 



Magnesia 2-56. 



Oxide of Iron 3-00. 



Oxide of Manganese 0-50- 



It has only been found on the banks of the Stura in the 

 Appennines, in a talcous rock. 



MAGNESITE. 

 HALO1DE. 



Magnesite. JAM. Syst. Vol. II. p. 281. Man. p. 315. 

 Carbonate of Magnesia. PHILL. p. 179 



Reniforna, tuberose, massive. Composition impalp- 



