DescriptionBritannica Sheelite.png	English: Diagram of a scheelite crystal with single-letter labels
Date	published 1911
Source	1911 Encyclopædia Britannica, Vol. 24, p. 315
Author	Unknown authorUnknown author
Permission (Reusing this file)	Public domainPublic domainfalsefalse This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

“Well-developed crystals are not infrequent; they usually have the form of acute tetragonal bipyramids (P in fig.); sometimes other pyramid-faces are present, and these (g and n) being developed on only one side of P indicate the parallel-faced hemihedrism of the crystals.”