242 
DESCRIPTIVE MINERALOGY. 
Fig. 110. 
Fig. 111. 
Putnam County. Minute crystals of apatite, having a bluish green colour, are found asso¬ 
ciated with pyroxene in Philipstown. They are, however, scarcely worth collecting as cabinet 
specimens. 
St. Lawrence County. Specimens have here been found of a size entirely unknown 
before. At Robinson’s farm, in the town of Hammond, a crystal has been found nearly a foot 
in length, and weighing eighteen pounds ! This, however, is not entirely perfect; but perfect 
crystals of a smaller size are abundant. 
They are six-sided prisms with six-sided 
pyramids (Fig. 108). Colours deep green, 
pale green and light blue. They are asso¬ 
ciated with zircon and feldspar, in a gangue 
of calcareous spar. Many of the speci¬ 
mens are remarkable for the proofs which 
they exhibit of having undergone fusion sub 
sequently to the time of their formation. 
Sometimes the terminations are rounded ; 
and at others, the whole crystal is bent as in 
the accompanying Figs. 110 and 111. The 
crystals also have a glassy appearance on 
the surface. I have observed the same rounded terminations in some of the specimens from 
Orange county. Dr. Emmons considers this as one of the proofs in favour of his theory 
of the igneous origin of primitive limestone.* 
Compound crystals similar to that represented in 
Fig. 112, have also been obtained at the preced¬ 
ing locality. 
About a mile southwest of the village of Gou- 
verneur, six-sided prisms have been found in the 
limestone, from four to six inches in length, and 
having a sea-green or mountain-green colour, as¬ 
sociated with scapolite and smoky quartz. These 
crystals sometimes have the form of the uniannu- 
laire of Haiiy. Fig. 113. M on x 129° 13' 53"; 
P on x 140° 46 / 7". At present, however, it is 
not easy to obtain good specimens at this loca¬ 
lity. 
Small but well defined six-sided crystals of this species are found accompanying sphene, 
pargasite, pyroxene and feldspar, in the town of Rossie, two miles north of the village of 
Oxbow. They are bluish green and translucent. Small sky-blue crystals have also been 
obtained from the limestone in the neighborhood of the village of Rossie, in this county. 
Fi s . 112. 
New-York Geological Reports, 183S. 
