Carlin or Carlin Black Matrix mine was located
North of Carlin in Elko County, Nevada. The
mine has not operated in a number of years and
today is in a large gold producing area. The
Carlin was a low production mine. In its high-grade
form it is a very beautiful medium to dark blue
turquoise with a hard black chert matrix.
Because of Carlin's hardness and intense blue
color it was at one time highly prized by some
of the finer southwestern Native American jewelers.
It is rarely seen today.
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CASTLE DOME (PINTO
Dome turquoise, which has also been known as
Pinto Valley, is a by-product of a copper mine
located five miles west of Miami, Arizona. Much
of Arizona turquoise comes from the copper mining
operations, which are often continuations of
old turquoise mines. The Castle Dome mine was
originally opened in 1943 and developed by the
owners as a war project. With the end of War
World II and a low demand for copper the mine
closed in 1953. Later the area was re-opened
as the Pinto Valley Mine. Turquoise was widespread
throughout with masses over one-half inch thick
with colors ranging from sky-blue to bluish-green
with the blue color being predominate. Early
on employees of the mine were permitted to dig
the turquoise on their days off. Large quantities
of the mineral were purchased by dealers in
the Globe and Miami areas. Later, the turquoise
concession was leased out to an individual who
then marketed the material thoughout the world.
This was a large producing mine though little
turquoise was of the high-grade quality. Most
of the grades of turquoise were sent out for
treatment. In the 1970's this area was considered
Arizona's second largest producer of turquoise.
According to the "Turquoise Annual"
volume 2." About 9,000 pounds of turquoise
are collected each month by the mine's lessee,
L.W. Hardy, who also leases Mineral Park Mine
The high-grade material that was produced consisted
of a beautiful bright and sometimes deep blue