FB76J7: Group of bluish octahedral crystals of very well defined faces and edges, on a smoky Quartz crystal partially covered by small crystals of Pyrite and Muscovite and with some small black crystals of Ferberite.
Kara-Oba, Betpak-Dala (Bet-Pak-Dala) Desert, Karaganda Region  Kazakhstan (±1992)

Specimen size: 10.1 × 4.9 × 4.1 cm = 3.98” × 1.93” × 1.61”

Main crystal size: 2.4 × 2 cm = 0.94” × 0.79”