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Stilbite. 



Stilbite is the most widely-distributed zeolite in East-Green- 

 land. It has been found in especially large quanties iu the 

 district south of Scoresby Sund, in which locality the crystals 

 are of comparatively large size. In the Sound itself and to the 

 north of it, this mineral is less plentiful and occurs in much 

 smaller crystals. Stilbite is most commonly found in isolated 

 crystals, or in masses consisting of few individuals. Well- 

 developed sheaf-like or cauliflower-like forms are very rare. 



Bartholins Bræ. Stilbite was found in the smaller 

 cavities of a brown dolerite rock, in which were also cavities 

 containing chabazite and levynite. The crystals were small 

 (2 — 3™°4 and plate -like, they were bounded by the faces 

 è{010}, c(00l}, e(01l}, the last-mentioned being somewhat 

 narrow; w{ll0} and/'llOl} are almost equally developed. The 

 crystals are colourless rather bright and translucent. 



Henry Land. 



1) On the east side of Mount Henry, a small fragment of an 

 amygdaloid was found, the walls of which consisted of very 

 small quartz crystals on which were a few stilbite crystals, 

 to the size of 15™"^. The form here is very different from 

 that of any other East-Greenland stilbite specimens, as the 

 crystals are very sheaf-hke, with/'(lOl} well-developed and 

 w{llo} insignificant or absent; c{00l} and e(01l} are also 

 found. The colour is almost pure white and the crystals 

 are semi-transparent. 



2) Also on the east side of Henry Mountain^ but rather near 

 the shore, some more stilbite was found, this being the 

 most important occurrence of stilbite as yet known in 

 Greenland. The diameter of the cavities in which it is 

 deposited varies up to 2 dm. The walls are coated with 

 layers of dark, cloudy lithomarge ; inside this are large 

 quantities of small quartz crystals (about 1™™ long), which 



