1: 



It is true that this mineral seems to be one of the latest 

 formed, but it is, however, very characteristic of the locality. 



Almost all the mineral localities on Narsarsuk contain 

 quartz associated with feldspar and ægirine. The mineral 

 occurs both massive and in crystals. The massive quartz fre- 

 quently fills the spaces between crystals of other minerals. It 

 is greyish, colourless or milk-white. 



Crystallized quartz is very common on Narsarsuk. and the 

 crystals are sometimes fairly large. Crystals measuring a 

 decimetre in diameter have been observed; such crystals are, 

 however, generally imperfectly developed. The crystals are in 

 most cases clear and colourless, sometimes white and opaque. 

 Also some fragments of smoky brown colour have been found. 

 Other tints have not been observed. 



On the larger individuals occur only the most simple 

 forms viz. 



m= {lOTo}, r={l0Tl}, and z = [oni) 



The two opposite rhomhohedrons are generally nearly 

 equally developed; in most cases, however, the positive and 

 the negative form are recognizable by the relative size of the 

 faces. 



The trigonal bipyramid, s= (2lTl) is seldom quite distinct; 

 but as natural etching figures often occur on the prismatic 

 faces, it is generally possible to conclude from them whether 

 a crystal is a right-handed or a left-handed individual. Most 

 combination-edges present narrow truncations. As, however, 

 these are not plane, but cylindrically curved, they are probably 

 not to be regarded as original crystal planes, but as solution faces. 



Also of the combination of faces the majority of the smaller 

 crystals are as simple as those described above. Only on a 

 few specimens from the locality No. I a small number of 

 individuals were found which present some forms of rather 

 uncommon occurrence. These crystals do not show the least 

 trace of etching. They are as clear as water, and their faces 



