NB37W5: Irregular aggregate of cubic crystals with a very well marked rough bevel on the edges. They have a very intense sky blue color with irregular violet color zones and abundant inclusions of small crystals of Chalcopyrite.
La Viesca Mine, Las Monjas pocket, La Collada mining area, Huergo, Siero, Comarca Oviedo, Principality of Asturias (Asturias)  Spain (05/2010)

Specimen size: 10.5 × 7.5 × 5.3 cm = 4.13” × 2.95” × 2.09”

Main crystal size: 7.3 × 6.3 cm = 2.87” × 2.48”