$455Median
25Sold (12 mo)
$600Last sale
Updated 1d ago
Willemite from Franklin Mine, Franklin, New Jersey, USA
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Pink masses of glaucochroite with leucophoenicite in a willemite matrix. The specimen comes with a previous label from the collection of Jack Nieburger.Franklin, New Jersey, historically renowned as the fluorescent mineral capital of the world, sits within the Franklin Mining District in the New Jersey Highlands. Geologically, the deposit consists of unique, intensely metamorphosed Neoproterozoic ore bodies hosted within carbonate rocks, formed through complex hydrothermal and metamorphic events that concentrated rare zinc, iron, and manganese minerals. The mining history dates back to the mid-17th century for iron exploration, but large-scale commercial extraction of zinc ores began in the 19th century, driven by companies like the New Jersey Zinc Company. Underground operations at the famous Sterling and Franklin mines continued for over a century before closing in the late 20th century, transforming the area into a legendary locality recognized globally for its unmatched diversity of over three hundred mineral species, many of which exhibit brilliant fluorescence under ultraviolet light.
Product details
SpeciesWillemite
SizeMiniature
Dimensions5.0 x 3.5 x 3.0 cm
Listed on11/06/2026
LocalityUSA, New Jersey, Franklin Mine
SKU2354267
Current owner
WM
Weinrich MineralsFeatured
3,650 for sale·9 sold
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Mineral guide
Learn about Willemite
fluorescent zinc silicate with UV glow; daylight colors range from colorless to pistachio, iconic from Franklin–Sterling Hill and Tsumeb.Regional guide
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