ZIRCONIA. 
379 
faces highly finished, but they are exceedingly brittle. The forms observed here, are the 
prisme of Haiiy, Fig. 415, being the primary with the edges of the base truncated ; the modi¬ 
fication of the same, Fig. 416 : the plagiedre of Haiiy, Fig. 417 ; the quadr is exdecimal of 
Hafiy, Fig. 418 ; together with those represented in Figs. 419, 420, 421, 422, 423 and 424. 
Fig. 415. Fig. 416. Fig. 417. Fig. 418. Fig. 419. 
P on l 131° 49'; P on u 152° 8'; Pon* 150° 5'; l on l 90° ; l on u 159° 17'; l on x 
142° 55'. 
Orange County. Zircon is of frequent occurrence in the towns of 
Cornwall, Monroe and Warwick. In the Forest of Dean, in the town 
of Monroe, it is found in very minute crystals in scapolite, associated 
with pyroxene. Near the outlet of the Two ponds in the same town, 
it also occurs in scapolite, and associated with crystallized pyroxene 
and sphene. These crystals are sometimes more than an inch in 
length, and exhibit the forms represented in Figs. 415 and 417 as above, 
and in ihe accompanying Fig. 425, binotriunitaire of Haiiy. P on s 
117° 48'; P on t 152° 6'; P on x 150° 5'; l on s 135°; l on x 
142° 55'. On Deer hill in the town of Cornwall, a mile southeast of 
the village of Canterbury, there is an abundant locality of zircon, 
which is accociated with magnetic iron ore, or the white quartz which 
Fig. 425. 
