No. 275.] 
161 
been polished, and prove very fine. They usually reflect only the green 
and blue colours. The best I have seen is in Warwick; also in Walkill, 
upon the farm of Dr. Shaver; and in Blooming-Grove, upon the farm of 
Joseph Moffat. 
Many other erratic stones are found, not deserving particular notice, 
but it should be remarked, that wherever transported fragments of a 
rock are seen in the county, they are always to the southward of the 
parent rock. Thus, from the south end of Mount Eve, a chain of 
blocks can be traced for miles, even into New-Jersey, of a character so 
peculiar as to render mistake impossible. Another stone found in roll- 
ed masses, in the county, is jasper. They are yellow, striped, red 
and black. Many of them contain cavities, lined with small but beau- 
tiful quartz crystals, and coatings of white, blue and yellow chalcedo- 
ny. Some of the jasper boulders are coarse, some fine and compact, 
some slaty, and some ferruginous. They have but a limited distribu- 
tion, being found only at the foot and on the northwestern declivity of 
Belle vale mountain, in Warwick. 
IRON ORE. 
This valuable mineral substance is found in Orange in great abun- 
dance. With a few exceptions to be noticed hereafter, it is associated 
with our primitive rocks. The most abundant as well as most valuable 
ore, is the magnetic oxide. It is generally found in that species of pri- 
mitive rock so common in the highlands of the county, and often called 
granitic gneiss or gneissoid granite It lies in beds and layers in this 
rock, having its line of bearing and its dip. Where it exists in layers, 
they are from one inch to twenty feet in thickness, in some places al 
ternating several times with the layers of rock. Where it is found in 
beds, the magnitude of the largest has never been ascertained. In the 
line of bearing, the extent of our deposits of this ore is not yet well 
ascertained. 
On the southeast side of Butter hill it is traced from the river, and 
from nearly opposite the village of Canterbury, by way of Monroe, 
quite into New- Jersey, a distance of about twenty-five miles. 
The most westerly of the great ore deposits now wrought, is called 
the Clove mine. It is the property of George Wilks, Esq. situated 
about a mile south of the village of Monroe. It has been open many 
years, and much ore has been used. The ore is the magnetic oxide. It 
is compact and granular. The latter is called shot ore. The pyrites is 
more or less disseminated through it. It makes red or hoi short iron. 
[Assem. No. 21b. \ 21 
