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Ch. 4: Emeralds

Ch. 3: Diamond Page of 451 Ch. 4: Emeralds Text size:minus plus Restore normal size   Mail page  Print this page
     
     
 
CHAPTER IV
  
 
 
  
 
EMERALDS
E MERALD is now but a general trade de­signation for various green precious and semi-precious stones and not, in the jewelry trade, the specific term of any gem mineral. Beryl, of the accepted green emerald hue, is the true or standard emerald. In the view of the mineralogical experts of the United States National Museum, recognition is accorded to five other varieties of " emeralds "; they are: Brazilian-tourmaline, Congo-dioptase, Evening-olivine, Oriental-corundum, and Uralian-gar-net. The green beryl, excepting in its colour, is the same mineral as aquamarine, golden, and other variously coloured beryls. One of the rarest of gems is a flawless emerald-hued beryl.
The crystallisation of the beryl is in the hexagonal system, usually long, and often hav­ing the prism faces more or less deeply striated
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Ch. 3: Diamond Page of 451 Ch. 4: Emeralds
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