PARAGASITE Chapter17. Inosilicates




	Figure 17-41. Crystal drawings of likely pargasite from the Fowler Quarry in Franklin. Drawings are from Palache (1935) who provided crystallographic data.

Pargasite, a sodium calcium magnesium aluminum silicate hydroxide mineral of the amphibole group, was initially reported from Franklin (presumably from the Franklin Marble) by Parsons (1930); the analysis, given by Palache (1935), is that of an edenitic hornblende using the conventions of Leake (1978). Pargasite is apparently very common in the local marble quarries; a large number of 1-3 cm crystals of light green color, including many from private collections, were analyzed by the writer and found to be pargasite. It is very likely that these are the “edenite” of Palache (1935), who illustrated numerous crystals (Figures 17-41, 17-42, and 17-43). An analysis of an uncommon massive green pargasite, associated with pyrrhotite, is given in Table 12. Kearns (1977) found pargasite to be abundant in the Franklin Marble in Orange County, New York, as well.




	Figure 17-42. Crystal drawings of likely pargasite from Sterling Hill; the bottom drawing is of a twinned crystal. Drawings are from Palache (1935) who provided crystallographic data.		Figure 17-43. Crystal drawings of likely pargasite from Franklin; the bottom drawing is of a twinned crystal. Drawings are from Palache (1935) who provided crystallographic data.

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CHAPTER 17. INOSILICATES