of iridefcent topper pyrites, oil a white
barytic gangart. The colours art beyond
defcription; the topaz yellow and gold;
the violet and azure, being blended in the
brighteft effulgence*
The calcareous fpar of E£ion, is a fin-
gular modification of the rhomb, very tranf-
parent* fometimes of a rich topaz colour,
and generally containing brilliant cryftal-
lized pyrites in the interior.
Fluor, water coloured or light blue, alfo
appears* finely cryftalUzed with galena*
By the decampofition of the capper py-*,
rites an the calcareous fpar* arifes a beautiful
green effiorefcence, clothing the fpar,
and fometimes appearing to pafs into pearl
fpar.
Eiion ajfo produces, mountain blue,, and
mountain green; the former approaching;
to azure, the latter to a light verclegris
colour* the. fraekire of thefe fubftances m -
earthy
earthy and uneven. They abforh moifture,
and appear to be cprapofed of barytes* granulated
calcareous fpar* and day, with iron,
and green calx of copper.
The famous vein of copper ore called
E&ou mine, lies near Harrington, being
what the Germans call a JlQ.ck worky and
the only one in this kingdom. It is fitu-
ated from the furface to. the bottom in a
blackifh brown , limeftone, the ftrata of
which are in the greateft confufion, ex*-
tremcly irregular, and running in all directions,
as the reader may judge from the
annexed plate.
This mine was probably worked at a
very early period ; it is one of the deepeft
in Europe, and it is now worked to the depth
of 220 fathoms or 1320 feet; during the
time it produced the greateft quantity of ore,
the profits where immenfe.
This work feems very different from the
generality of veins; it has the appearance.
of