La Juanona quarry, Antequera, Málaga, Andalusia, Spain

Pseudohexagonal dipyramid low-temperature alpha quartz, up to 5mm in diam., - the classic Cumberland habit.

Bought 2008 as blue quartz with inclusions of magnesioriebeckite, but according to analyses of similar specimens from Juanona Quarry, the blue color comes from aerinite and crocidolite...