$295Median
1978Sold (12 mo)
$45Last sale
Updated 3d ago
Calcite from Franklin, New Jersey, USA
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A large sharp lustrous octahedral crystal of franklinite 4.0 x 3.0 x 2.5 cm in size is embedded attractively up on a white massive calcite matrix with many much smaller crystals and masses of franklinite. In good condition. The calcite is brightly fluorescent. The specimen comes with a previous label from the collection of Ray DeMark.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
SpeciesCalciteFranklinite
SizeCabinet
Dimensions10.5 x 8.0 x 7.0 cm
Listed on11/04/2026
LocalityUSA, New Jersey, Franklin
SKU2063656
Current owner
WM
Weinrich MineralsFeatured
3,650 for sale·9 sold
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Mineral guide
Learn about Calcite
diverse shapes, colors, and optical quirks; widely available yet scarce elite pieces from Elmwood and Charcas drive collecting value and display.Regional guide
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