58 Sypney- H. BALL: 
Rock crystal 
occurs in some of the pegmatites and some of the amygdules of the 
basalt of Disco Island are composed of moss agate, chalcedony, agate, 
greenish jasper, hyalite, and common opal. Rose quartz is also reported. 
Garnet 
was first mentioned by Davin Crantz in 1765. Deep reddish-pink 
garnet is common both in the pegmatites and as a metamorphic mineral 
in the granite gneiss and hornblende gneiss near pegmatite intrusions. 
It occurs in crystals up to 5cm (2 inches) in diameter and may make 
up one-half the gneiss or pegmatite. In places it has been concentrated 
in beach sands as at Isua near Christianshaab, where garnet sand occurs 
in considerable quantities along the beach for 2.5 km (14/, miles). Garnet, 
however, is not likely to find use either as a semi-precious stone or 
as an abrasive. It is reported, however, that some 60 years ago some 
of the more perfect garnets associated with the graphite of Upernivik 
were collected by the Eskimos and sent to Denmark either as curiosities 
ог as semi-precious stones and indeed Joan MAwE writing in 1823 
states that some gem garnet was obtained in Greenland in his time. 
Cryolite 
forms an appropriate material for Greenland souvenirs, particularly 
when these are fashioned by Eskimos. The natives cut it cleverly into 
boxes or carve miniature polar bears from it. Because of its snowy 
whiteness and numerous cleavage planes, it is perhaps a more beautiful 
material than alabaster, for globes for indirect illumination. 
The sapphirine 
from Fiskernes is a pleasing sea-blue, but like cyanite, too readily 
cleaves for successful use in jewelry. 
Ornamental stones 
are not particularly abundant in Greenland. The highly garnetiferous 
granite gneiss occurring at Isortok fiord and at other graphite localities 
north of Holstenborg is pleasing on account of the contrast between 
the rose pink garnets and the white quartz-felspar groundmass. It 1s, 
however, rather too platy in structure to be satisfactory for building 
purposes. At Ekalugsuit some of the crystalline limestone is a coral-pink 
marble, containing numerous aggregates of pleasing greenish metamor- 
phic minerals. The limestone is, as a rule, magnesian and very siliceous 
and hence is unsuitable for lime. It, together with some of the granites, 
furnish excellent building stone material. 
