FLUORESCENT WOLLASTONITE ROCK

FLUORESCENT WOLLASTONITE ROCK

Fluorescent Wollastonite Rock with a little Willemite.  A different Fluorescent Specimen to add to your collection.  This mineral is Short Wave UVC Fluorescent.  Under magnification the little black specks are green translucent with a few metallic specs too.  From the Famous location of Stirling Hill Mine where many exotic Fluorescent minerals come from.

Location:
Sterling Hill Mine, Franklin, New Jersey, USA.

Dimensions:
8.4cm x 5.7cm x 6.1cm, 368g.

Wollastonite
Calcium Silicate
CaSiO3.

Wollastonite is a common mineral in skarns or contact metamorphic rocks.  Skarns can sometimes produce some wonderfully rare and exotic minerals with very unusual chemistries.  Wollastonite has no unusual elements in its chemistry and it is somewhat common and not considered exotic among collectors.  Wollastonite forms from the interaction of limestones, that contain calcite CaCO3 with silica SiO2 in hot magma.  When hot magma intrudes limestones under volcanoes and then blown out of them.

It is an important constituent in refractory ceramics such as refractory tile and as a filler for paints.  Mineral specimens can be interesting with their fibrous habit, pearly luster and some specimens.  Especially those from Franklin, New Jersey, will fluoresce.  Named for the English chemist and mineralogist W. H. Wollaston.

Willemite
Zinc Silicate
Zn2Sio4.

Willemite is a rare zinc mineral.  The deposit at Franklin, New Jersey is unique.  Minerals such as Zincite, Franklinite, Rhodonite, Greenockite, fluorescent Calcite and various zeolites.  In the case of Willemite the secondary minerals were probably Smithsonite and Hemimorphite.  At other localities for Willemite it is more scarce and forms as a secondary mineral from primary zinc deposits.

Renamed in 1830 in honor of William I, King 1813-1840 of the Netherlands.

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The Historical Story of Franklin Mine