Franklinite in 5x5cm box.
35 units Lot
Some specimens fluoresce under ultraviolet light.
Origin: Franklin, New Jersey (USA)
Franklinite is a rare oxide mineral belonging to the spinel group, composed of zinc, iron and manganese. It is notable for its metallic black colour and its habit of well-defined octahedral crystals, making it an essential specimen for advanced mineralogical collecting. It is a key specimen in the study of zinc deposits, being world-famous for specimens from Franklin (New Jersey), where it is frequently found associated with fluorescent minerals.
