EM26M2: In this excellent sample, Sphalerite crystals are showing extremely defined crystalline forms, more than usual for the species. Tetrahedral faces are dominant but other accessory faces are perfectly visible. The Sphalerite crystals are very aerials on a Quartz crystal-rich matrix also with Chalcopyrite and Galena crystals.
This specimen has been photographed and published as a novelty at the 2008 Ste. Marie Show in the magazine Le Règne Minéral number 82 (July-August 2008), page 82.
Borieva Mine, Madan mining area, Rhodope Mountains, Smolyan Oblast  Bulgaria (06/2008)

Specimen size: 7 × 6.5 × 5.9 cm = 2.76” × 2.56” × 2.32”

Main crystal size: 0.9 × 0.9 cm = 0.35” × 0.35”