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M812 Franklinite & Willemite & Calcite

M812 Franklinite & Willemite & Calcite

$18.00

This is a combination mineral of Willemite, Franklinite and Calcite from world famous Franklin locale in New Jersey. This exceptional specimen measures 2 1/8″ x 1 7/8″ x  1 5/8″ and has not been polished.  It has small black metallic Franklinite crystals on a Calcite matrix and a scattered amount of Willemite as well.  This awesome specimen displays brilliant orange and green under SW/UV light and pinkish purple under a LW/UV light (not shown).  Very nice!

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Description

Franklinite, named for Benjamin Franklin, is found in Franklin and Sterling Hill, Sussex County, New Jersey.  It is black in color and a slightly magnetic member of the spinel group.

Willemite is a rare nesosilicate  and zinc mineral found principally in Franklin, New Jersey with Franklinite and Zincite. Willemite can have a variety of colors from white, colorless, reddish, green, yellow, orange and black.  It is known for its brilliant green fluorescence.

Calcite is a Carbonate mineral that is most widely distributed on the Earth’s surface.  It is a common constituent of sedimentary rocks with Limestone in particular.  A Calcite formation can take on many different shapes and sizes which is dependent on the location, ground water occurrence and temperature.  Calcite is usually white or colorless but can be gray, red, yellow, green, blue, violet, brown or black.  The deeper the color is usually indicative of the definitive impurities from the earth or water.

Additional information

Weight.50 lbs
Dimensions2.125 × 1.875 × 1.625 in

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