MB28AL0: Complex crystals of Sphalerite with tetrahedral habit, but very rich in faces and with curvatures on the faces and edges. Transparent with intense color of a different tone from the usual, less red and more greenish-yellow. With inclusions and on a Dolomite encrusted matrix.
Áliva Mine (Las Mánforas Mine), Áliva mining area, Picos de Europa massif, Camaleño, Comarca Liébana, Cantabria  Spain

Specimen size: 4.7 × 4.2 × 3.7 cm = 1.85” × 1.65” × 1.46”

Main crystal size: 1.5 × 1.3 cm = 0.59” × 0.51”