Orberg Quarry, Schelingen, Kaiserstuhl, Baden-Wurttemberg, Germany

6.1 x 4.8 x 4.3 cm
2.4 x 1.9 x 1.7 in

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Ex. Steve Pullman, M. Leonardi collection

MgFe³⁺₂O₄

Magenesioferrite is a rare member of the spinel group and is present as black crystals. None of the crystals appear to be complete. The arrow points at the largest, but there many smaller crystals which exhibit much better luster. Also present, are small, crude crystals of Pyrochlore variety: Koppite which are a dark red/brown and exhibit a high luster. Also present are small needle like crystals of Apatite of the variety: Cerapatite; the name referring to Cerium in the composition. Moe Leonardi was the superintendent of the chemical plant at Trona in California.

Condition: Composed of massive material.

Flaws: Most of the Magnesioferrite crystals are incomplete.

This mineral is also found in the following galleries: Minerals From Europe | Oxides and Hydroxides | Phosphates | Rare Minerals | Minerals Priced Between 25 and 49 Dollars