GEOLOGY AND SCENERY OF NORTHEAST COAST 95 



colour flashed from the coarse, vein-like patches in the rock. 

 With each changing angle of vision a new splendour of 

 gorgeously tinted rays shot out of the finely contrasted dark 

 gray of the general rock-surface. It is no wonder that every 

 effort should have been made to market the stone. Yet, 

 with all their resources, Tiffany and Company have had 

 to decide against the success of the material as a gem. 

 One of the chief difficulties in working the stone lies in 

 its extremely brittle and cleavable nature, forbidding the 

 production of a well-polished surface. The conditions of 

 nature do not, however, prevent the collection of many 

 uncut specimens of exceeding beauty. The finest material 

 yet seen in the bed-rock occurs on or near Napoktulagatsuk. 

 The settlers on the coast report abundant iridescent lab- 

 radorite also on Mt. Pikey, southwest of Ford Harbour. 



A complete account of this interesting formation would 

 necessarily involve a description of the other minerals 

 composing the gabbro, but that would carry the reader far 

 into the domain of the rock-specialist. 



The relative ages, areal distribution, and exact com- 

 position of the hundreds of igneous rock-bodies between 

 Belle Isle and Cape Chidley must be left almost entirely 

 to future discovery. From the magnificent exposure of 

 these terranes a splendid harvest can be promised to all 

 geological expeditions to the coast. 



The Nain gabbro seems to have been " intruded" into 

 the older rocks after the mountain-building, with its folding 

 and crumpling, was nearly completed. This at least ap- 

 pears to be the testimony of the rock-ledges themselves. 

 If the gabbro had already been crystallized out before any 

 considerable amount of the lateral crumpling still remained 



