Mineralpedia Details for Hilgardite
Named after Eugene Woldemar Hilgard, who was a German-American geologist and one of the fisrt to study the Lousiana salt diapir/dome deposits. Hilgardite is a rare mineral that is found in marine evaporate deposits in localities in the United States in the Choctaw salt dome in Lousiana and in Mississippi and Alabama, in potash mines in Canada, Germany, England, salt domes in Kazakhstan, Russia, and at the Dead Sea in Israel. Hilgardite is piezoelectric, generates a charge in response to pressure.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/hilgardite.pdf
Hilgardite from Boulby Potash mine, Loftus, Cleveland, England
Pink micro crystals of Hilgardite occuring with and in light blue cubic Boracite crystals.