Earth:Double terminated crystal

From HandWiki
Short description: Crystal with natural faces on both ends
Doubly terminated amethystine quartz crystal

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

References

  1. Shipley, Robert M. (2011). "termination". Dictionary of Gems and Gemology. Read Books. p. 99. ISBN 978-1-4465-4701-4. https://books.google.com/books?id=aUZ8CgAAQBAJ&pg=PAT99.