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Andalusite from
Leiperville, Ridley Township, Delaware County, Pennsylvania, USA


03021520017615096198040.jpg
Andalusite

Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
08302910017613375475369.jpg
Andalusite

Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
01904540017613375471638.jpg
Andalusite

Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
09049920017612980443529.jpg
Andalusite

Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
08759640017612980143426.jpg
Andalusite

Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
02068810017612981338917.jpg
Andalusite

Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
03021520017615096198040.jpg
Andalusite

Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
08302910017613375475369.jpg
Andalusite

Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
01904540017613375471638.jpg
Andalusite

Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
Classification
Species:Andalusite
Formula:Al2(SiO4)O
Comments:According to "Mineralogy of Pennsylvania 1966-1975", Robert C. Smith, Andalusite has been removed from the list of occurrences in Pennsylvania. All existing specimens tested by x-ray powder diffraction proved to be Kyanite pseudos (M. L. Crawford, 1975).

Regional Metamorphism has converted all these andalusites to Kyanite. These are excellent paramorph specimens. http://www.mindat.org/forum.php?read,7,305374,305438#msg-305438
Confirmation
Validity:Erroneously Reported
Data
Mineral Data:Click here to view Andalusite data
Locality Data:Click here to view Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:1694532
Long-form Identifier:1:3:1694532:4
GUID (UUID V4):0
References
Yale Peabody Museum mineral collectionIdentification: Dealer/Collection Label
 
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