Halite and Borax mixed crystal.
This is an attractive crystal of halite (basically salt) and borax (sodium borate) from the Rhodes salt marsh in Nevada. Source:eBay seller ilickrocks Contributor:Theodore Gray Acquired:8 February, 2009 Text Updated:8 February, 2009 Price: $5 Size: 1.5" Composition:NaCl + Na2B4O7\[CenterDot]10H2O