Heulandite, a sodium calcium aluminum silicate hydrate mineral of the zeolite group, was first reported and illustrated from Sterling Hill by Palache (1928a, 1935). Here it is associated with hematite on the 1000 level. Casperson (1956) reported it in colorless crystal groupings with stilbite in vugs in the Buckwheat Dolomite, and Cook (1973) reported it on a fracture surface in gneiss from Franklin. More recently, fine crystals have been found on the 1200 and 1300 levels at Sterling Hill, some associated with the gneisses in the central core. (Dunn, 1995)

 Location Found: Ogdensburg
 Formula: (Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
 Essential Elements: Aluminum, Hydrogen, Oxygen, Silicon, Sodium
 All Elements in Formula: Aluminum, Calcium, Hydrogen, Oxygen, Silicon, Sodium
 IMA Status: Approved
 To find out more about this mineral at minDat's website, follow this link   Heulandite-Na

Dunn, Pete J. (1995). Franklin and Sterling Hill New Jersey: the world's most magnificent mineral deposits. Franklin, NJ.: The Franklin-Ogdensburg Mineralogical Society. p.513. 'Heulandite'

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.61

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 38, Combined Issue 1997, pg. 30Ferroaxinite and Heulandite From the Lime Crest Quarry: New Minerals for the Locality
View IssueV. 11, No. 2 - August 1970, pg. 3Mineral Information - Heulandite and Stilbite From Franklin N.J. by William C. Casperson
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