Franklinite
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Franklinite is an oxide mineral belonging to the normal spinel subgroup's iron series, with the formula ZnFe3+2O4.
Franklinite (black) with Zincite (red)
A microscopic picture of Franklinite
Franklin Furnace
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Franklin Furnace, also known as the Franklin Mine, is a famous mineral location for rare zinc, iron, and manganese minerals in old mines in Franklin, Sussex County, New Jersey, United States. This loc
Franklinite
…as a single large euhedral crystal. Franklinite was a minor ore of uranium, sulfuric acid, and mercury. It is named after its local discovery at the Franklin Mine and Sterling Hill Mines in New Jersey. In 2023, Franklinite was designated the state mineral of New Jersey…
Franklin Furnace ca. 1900