For more than thirty years Excalibur Mineral Corp. has been providing private collectors, researchers, major universities and museums throughout the world with reliably identified, rare and unusual mineral samples for science and display.
  Mineral News, The Mineral Collector's Newsletter,
is published monthly and is filled with timely articles about field collecting, descriptive mineralogy and new mineral finds.
  The Hudson Institute of Mineralogy is dedicated to the discovery, study and preservation of rare mineral species, and to increasing public awareness and appreciation of the mineral kingdom through outreach and education.