W. E. Ford — Interesting Beryl Crystals. 



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Art. XIX. — Some Interesting Beryl Crystals and their 

 Associations ; by W. E. Ford. 



The beryl crystals commonly found in pegmatite veins are 

 prismatic in habit, consisting of a simple combination of the 

 prism of the first order, m, with the base, e, and as a rule are 

 only semi-transparent, and of a green color. It is the chief 

 purpose of this article to describe several striking exceptions to 



this general rule, and to point out some interesting similarities 

 in crystal habit, color and association shown by a series of 

 beryl crystals from a number of different localities, all of 

 which are noted for the occurrence of variously colored tour- 

 malines of the lithia variety and of gem quality. 



The pegmatite deposits of San Diego Co., California, which 

 have become famous on account of their beautiful tourmalines, 

 have lately furnished some beryl crystals of an unusual habit 

 and uncommon color. Figure 1 is of a crystal from the 

 deposit at Mesa Grande, while figures 2 and 3 are of crystals 

 from the locality of Fala. The short prism which they show, 

 especially in figures 1 and 2, together with the large and 



