On the Mineralogy of Chester County, Penn. fyc. 5 



Zircon, an interesting locality of this mineral occurs in bluish 

 quartz, near Jeffries' ford. 



Feldspar, of a bluish color and lamellar structure, occurs near 

 Jeffries' ford on the Brandywine. 



Amethyst, of a rich violet color, highly transparent, in hexa- 

 hedral prisms terminated by pyramids, occurs detached in 

 the soil, on James Gibbon's farm, three miles south of 

 West Chester. Fine specimens from this locality, are in 

 the cabinet of Natural Sciences of West Chester. 



Sulphuret of iron, in large cubic crystals, on R. Woodward's 

 farm. 



Red oxide of titanium, same locality. 



Sulphuret of iron, in cubic crystals, on Job Darlington's farm. 



Plumbago, same locality. 



Necronite, well characterized in disseminated masses, in Ben- 

 jamin Copes' quarry. 



Schorl, of a beautiful jet black color, on J. Painter's farm. 



Pennsborough Township. 



Necronite, in carbonate of lime, in Mendenhall's lime quar- 

 ries. 



Amethyst, in beautiful violet crystals, on George Darlington's 

 farm, adjoining Wister's. 



Bog iron ore, same locality. 



Mica, in regular hexahedral prisms, in granite, near Darling- 

 ton's mill. 



Newlin Township. 



Green quartz, in drusy clusters and prismatic crystals, on the 



serpentine ridge near Mason's farm. 

 Limpid quartz, in hexahedral prisms terminated by pyramids, 



in carbonate of lime, in Edwards' lime quarries. 

 Fluate of lime, of a deep blue color, in small cubic crystals, 



same locality. 

 Calcareous spar, in rhombic crystals and hexahedral prisms, 



having irregular sides, same locality. 

 Schorl, in beautiful cylindrical crystals, of a jet black color, 



same locality. 

 Beryl, of a rich green color, near William Embrie's malt 



house, in detached crystals. 

 Green mica, in foliated masses and crystallized in granite, 



near the celebrated beryl locality. 

 Green foliated talc, same locality. 



