JFD97AO2: A very good example of the quality of the sphalerites from the Troya mine, with the addition that since the matrix is all Dolomite, there are no sulphide stains of any kind and that is why the matrix looks so white, despite the many years that have passed since it was found.
Troya Mine, Troya mining concession, Mutiloa / Gabiria, Comarca Goyerri / Goierri, Guipúzcoa / Gipuzkoa, Basque Country (Euskadi)  Spain (1985)

Specimen size: 4.1 × 3.2 × 1.9 cm = 1.61” × 1.26” × 0.75”

Main crystal size: 1 × 0.8 cm = 0.39” × 0.31”