72 Notice of a Locality of Zeolites. 



natrolite. The apophyllite is of a very fine quality, both as re- 

 gards crystallization and lastre. A specimen or two of pseudo- 

 morphous crystals was also obtained here, supposed to be all that 

 were found at Bergen Hill, composed of apophyllite and the black 

 matter which occurs in some of the veins of the greenstone. 

 The crystals have the regular form of the apophyllite. 



No. 14, farther on, same side of the cut, is a vein of carb. lime, 

 which is unworthy of notice but for the primary form of apophyl- 

 lite, which is found about six feet from the top of the cliff. From 

 the appearance of this vein, however, I think that a specimen in 

 my collection was thrown out of it. It is about three or four 

 inches thick, and eight long, presenting a fine surface, almost en- 

 tire, of the secondary form of apophyllite. 



All of these localities, with but few exceptions, were examined 

 by standing on a ladder which was carried about for the purpose, 

 and it is possible, though not probable, that further scrutiny will 

 develope others. 



Most of the specimens of this place have been found among 

 the heaps of loose stones which lie on the hill near the road, as 

 well as on the wharf at Jersey City, which, however, is now filled 

 in, and all attempts to obtain any more from the latter source will 

 be vain. Datholite I believe to have been the most common ; 

 massive apophyllite, from one to two inches thick : Thomsonite, 

 commonly half an inch thick, in veins — some an inch, and a few 

 specimens in my possession, two inches thick. A (e^^ specimens 

 only of stilbite have been found loose, and the quantity obtained 

 from its localities was not very great. All the epistilbite was 

 procured at No. 4, except when associated with datholite, and, in 

 these cases, the specimens are of great beauty. Some of them 

 are of large size, presenting surfaces of from four to six inches 

 square. The natrolite is quite rare, a few specimens only having 

 been taken from the cliff, at the localities before described, with 

 the exception of one which was found loose. 



Brown Thomsonite, in fine masses, some of it two inches 

 thick, and well crystallized, is exhausted — we could not find it 

 in place, after a fruitless search. 



The chabasie of this locality is very inferior, and none of the 

 crystals are perfect except very small ones. 



One of the loose masses had datholite, stilbite, analcime, cha- 

 basie, apophyllite, (primary form,) and calc-spar upon it, forming 

 an unusual association. 



