A Rare Franklin Clinohedrite and Hardystonite Specimen
from the world famous Park Shaft at the Franklin Mine in Franklin New Jersey
weighing 1,128 grams or 2.485 pounds
measuring 4 1/2 x 2 3/4 x 2 1/4 inches
$300.00 No Reserve
Clinohedrite fluoresces a brilliant pumpkin orange under shortwave ultraviolet light
Margarosanite fluoresces pale blue under shortwave ultraviolet light
Willemite fluoresces green under both shortwave and longwave ultraviolet light
Calcite fluoresces reddish orange under shortwave ultraviolet light
Hardystonite fluoresces brilliant blue under shortwave ultraviolet light
Microcline fluoresces light blue and pink under shortwave ultraviolet light
not all minerals from Sterling Hill or the Franklin Mine are fluorescent or phosphorescent
from the Luzzi Collection
below photos are of my brother Rich and I taken
underground in the Sterling Hill Mine in the early 1990's
Shipping and Insurance
Hill and Franklin Zinc Mines
began at the site in the 1630s, when it was mistakenly
thought to be a copper deposit. George III of the
United Kingdom granted the property to William
Alexander, titled Lord Stirling. Stirling sold it to
Robert Ogden in 1765. It went through several owners
until the various mines were combined into the New
Jersey Zinc Company in 1897. The mine closed in 1986
due to a tax dispute with the town, which foreclosed
for back taxes in 1989 and auctioned the property to
Richard and Robert Hauck for $750,000. It opened as a
museum in August 1990.
During the mid-to-late 19th century the furnace was the center of a large iron making operation. Russian, Chilean, British, Irish, Hungarian and Polish immigrants came to Franklin to work in the mines, and the population of Franklin swelled from 500 (in 1897) to over 3,000 (in 1913).
The Furnace mine which was adjacent to the actual furnace, was a 120+ foot vertical shaft just under Franklin Falls. Other rare minerals include esperite, clinohedrite, hardystonite, and others. There are scores of minerals found only here, such as johnbaumite (an arsenous apatite), mcgovernite, etc. Sterling Hill, a very similar zinc orebody, is located a few miles away in Ogdensburg.
In the area of the Franklin and Sterling Hill mines, 357 types of minerals are known to occur; these make up approximately 10% of the minerals known to science. Thirty-five of these minerals have not been found anywhere else. Ninety-one of the minerals fluoresce. There are 35 miles (56 km) of tunnels in the mine, going down to 2,065 feet (629 m) below the surface on the main shaft and 2,675 feet (815 m) on the lower shaft. As of 2017, other than the very top level of the mine (<100 ft), the entire lower section has been flooded due to underground water table and hence no longer accessible. The mine remains at 56 °F (13 °C) constantly.