This specimen has unusually large, well-formed, sharp crystals to over 1 cm, and is part of the piece illustrated in Barlow's book on page 349 (I trimmed that specimen when i bought it in 1998 and just got this half back in a collection purchase, funny enough). It has a long history dating to a one-time find on the mine dumps in the 1980s. These are regarded as among the best of species. 5.6 x 3.1 x 1.6 cm
Attribution: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
You are free:
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.