What is crystal structure?

Apr-06,2013 06:44 AMCST   CkyBuy   Bookmaker: CkyBuy Admin    
SUBJECT: Earring   Necklace   Ring  

The internal atomic structure of a crystal. All crystalline gems may be classified in one of seven groups according to the symmetry of their structure: cubic, tetragonal, hexagonal, trigonal, orthorhombic, monoclinic, and triclinic.

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