Double terminated crystal

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Doubly terminated amethystine quartz crystal Quartz-131593.jpg
Doubly terminated amethystine quartz crystal

A doubly terminated crystal, or double-terminated crystal, is a crystal with natural facets on both ends. [1]

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References

  1. Shipley, Robert M. (2011). "termination". Dictionary of Gems and Gemology. Read Books. p. 99. ISBN   978-1-4465-4701-4 via Google Books.