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Spinel

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Franklin mine in New Jersey needs no introduction and this fabulous Spinel crystal will make a great addition to any collection centred on this most famous locality. The Spinel forms a perfect octahedral crystal, its lower four faces remaining embedded in the white Calcite matrix. Its upper pyramidal edges measure 1.8 cm and are all razor-sharp. Two faces are mirror-smooth while two display a rougher texture, mainly due to interruptions produced by growth patterns. The crystal appears jet-black and at first could be mistaken for Franklinite, but close inspection reveals it to be intensely dark inky blue. A fine and quite rare example of well crystallized Spinel from the Franklin mining district in Sussex County, New Jersey, USA.

Product details

SpeciesSpinel, Calcite
SizeMiniature
Dimensions3.7 x 4.0 x 2.9 cm
Added on10/24/2024
Current owner
Unknown Owner
Acquired
Jul 2026
Price paid
$1,500.00
Previous owners
DateCollectorAcquisition price
—Crystal ClassicsNot disclosed

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Spinel
Mineral guide
Learn about Spinel
, color range from ruby red to cobalt blue, sharp octahedral form, hardness 8, rare gemmy crystals on marble, prized by collectors for rarity and luster.
Spinel
Regional guide
Spinel from Franklin Mining District
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Locality guide
Franklin Mining District
Franklin Mining District, USA — renowned for franklinite, willemite, zincite, and calcite; world-famous fluorescent suite and premier collector locality.