Ilmenorutile is a niobium-rich variety of rutile, with the formula (Ti,Nb)O₂. In this specimen, some crystal faces can be observed. It most likely comes from the Diéresis quarry, where, during the 1980s, masses weighing several kilograms with developed crystal faces were found, enclosed in the pegmatite. From the Vilaseca collection, acquired from the well-known Barcelona mineral dealer Marçal Llòria (Lloid).

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