- Quartz, Magnesioriebeckite
- Antequera, Malaga, Andalusia, Spain
- Small Cabinet, 8.0 x 5.0 x 3.0 cm
Definitely one of the finer specimens of the unusual and striking Blue Quartz from the famous locality in Spain. These modified crystals have good crystal development for the variety. Here, the best-developed crystal (.4 cm on edge) has a modified termination that almost looks dipyramidal, and the luster is superb. The blue color is caused by fibrous inclusions of Magnesioriebeckite.