o2 



JOURNAL OF THE 



tals of this variety of spodumene have added nineteen new 

 j)lanes* to the species. Its eleavaj^^e angle = SQ° 46' 37V'. 



Careful analyses by Smith and Genth yielded the following 

 results : 



Genth. 



63.95 



26.58 



0.18 



100.40 



100.25 



To-day fine examples of this gem are quite the rarest among 

 ])recious stones, and the demand was never supplied for the bet- 

 ter sizes. "Owing to the dichroism there is a peculiar fire. to 

 them which is wanting in the true emerald." — Dr. E. S. Dana, 

 Am. Jour. Sci., Se})t., 1881, p. 182. "It is a variety (of spodu- 

 mene) rivaling the emerald as a gem," states Prof. J. D. Dana 

 in his Manual of ^lineralogy (1887), ]). 2G9. 



Plate 1 includes two crystals (jf Hiddenite [the two in the 

 front middle foreground with their points extended towards the 

 reader.] The larger crystal is the finest one yet discovered. It 

 was 68 millimeters long and 7X14 thick. It would furnish two 

 gems weighing over five carats each, one of which would be of 

 superb dark-green color. Up to the discovery of this crystal 

 (which is now in the Bement collection) the largest cut gem 

 weighed but 2f carats, and it had been sold to a wholesale gem 

 broker in 1880 at the rate of f$100 per carat. 



The work of development at the mine has reached a depth 

 of fifty-eight feet, thirty-two feet of which is in the solid rock. 

 The formation continues unchanged, and the last work done 

 yielded a handsome })ercentage of i)rofit. 



Spodumene (other than the emerald-green variety). — The 

 ordinary common variety of opaque gray spodumene has not as 



♦Described by Dr. E. S. Dana and the late Prof. G. Vom Rath. 



