1813.] 



MiTierals from Greenland, 



109 



a very coarse grain, and lasalt in small columnar irregular 

 fragments, from one inch and a half to two inches in length ; 

 none of them exceeds an inch in thickness. The ends are coated 

 with a vitreous covering, similar to whaX was obtained on the 

 sides of Basaltic veins by Sir George Mackenzie and his friends 

 in Iceland. I suppose from their appearance that they are 

 portions of a very minute vein of rjasalt. Fitchstone; the 

 colour of this substance is dark green : fracture small, con- 

 choidal, and uneven. Through the mass are dispersed numerous 

 circular spots, somewhat lighter in colour; from ihe centre of 

 v/hich, in a strong light, a fibrous radiation may be observed. 

 , I have met with an appearance analogous in Arran ; but am 

 pot aware that any thing of the kind has been before noticed 

 in any of the mineralogical works, altbough it be of a descrip- 

 tion calculated to create interest. Sandsto?ie in slaty fragments 

 of a dark ochry red colour, with whitish orbicular spots ; also a 

 lighter red compact variety, similar to some of our indurated 

 sandstones. I likewise found some masses of brescia composed 

 of angular fragments combined by a paste of crystaline quartz» 

 The inclosed masses are pieces of sandstone. 



I have now to enumerate the minerals above noted. 



Cryolite 







Granular 



Fluate of lime 







Granular 





In plates 

 Compact, and 

 Rose coloured 



Zircon 







Green and 

 Common 







Granular 

 Lamellar 

 Compact 

 Green, and 

 Opalescent 



Sodalite 

 Sahlite 

 Tourmaline 

 Amphibole 



Augite . . . . , ^ , , . , . Crystalized 



Fibrous 



