Mineralogy of Orange County, JV. Y. 231 



by a fracture, and reveals a small cavity that contains crystals of Co- 

 rundum. This spot has fui-nished a number of handsome crystals of 

 bluish white Corundum, attached to loose masses of grey Hornblende. 



Locality No. 6, is one mile north of Amity church, upon land 

 owned by Wm. Raynor, and situated in a wood. The Limestone 

 merely crops out over an extent of a few rods, and is filled with Bru- 

 cite of various colors, but mostly dull ; black Spinel in hemitropes, 

 and Magnetic Iron in large octahedral crystals, whose faces are 

 rough ; it also contains Hornblende and blackish Serpentine. The 

 aggregate is in a decomposing state, apparently from the presence of 

 the Octahedral Iron. 



No. 13 is situated upon the land of Isaac Smith, two and a half 

 miles north of Edenville. It affords handsome groups of Spinel 

 crystals. To obtain them, it is necessary to dig into a side hill, and 

 roll over large blocks of an aggregate consisting of Hornblende, Mica 

 and Limestone, upon whose surfaces and in veins traversing them, 

 we often find druses of large octahedral crystals, varying in size from 

 a quarter to one inch in diameter. Their form is well defined, the 

 edges of the octahedrons being sharp and their surfaces perfectly 

 flat. They are of a dark green, almost black, color ; and are often 

 possessed of a good degree of lustre. This place produces, occa- 

 sionally, handsome crystals of Zircon, straw colored Brucite, and 

 green and black crystallized Hornblende. 



No. 14 is a spot between Mt. Adam and Mt. Eve, upon the farm 

 of Wm. Davis, which affords red and black Spinel, red Brucite, Au- 

 gite, green Hornblende, Idocrase and Scapoliie. 



No. 15 situate upon the declivity of Bellvale Mt. affords handsome 

 four-sided prisms of Rutile, terminated by four-sided pyramids. They 

 are about half an inch in diameter, of a brownish. black color, and 

 free from those strise common in the crystals of this substance. The 

 gangue is a sienitic Granite, which also contains handsome crystals of 

 brown Zircon and lengthened prisms of Wldte Iron Pyrites, termin- 

 ated at both of their extremities by dihedral summits. 



The Magnetic Iron deposit. No. 16, is described as occurring in 

 the blue Limestone ; but it is more probable that it belongs to the 

 primitive, which may approach the surface at this spot. A perpen- 

 dicular excavation, twenty five or thirty feet in depth, was made here 

 many years ago for the purpose of working the ore ; but the limited 

 quantity in which it occurred, caused the undertaking soon to be 

 abandoned. The ore existed in isolated masses from the size of a 



