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Stellerite : Ca[Al2Si7O18]·7H2O
minID: TRG-2UN

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Stellerite from the Vulcan Manassas Quarry. These have been analyzed and the differences between these and the stilbites for this locality documented by Dr. Lance Kearns at James Madison University.

Approximately 6 cm along the longest edge.

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Photo added: 18th Mar 2012

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