2.4 x 2.2 x 1.6 cm (largest). A rare and superb, 4-piece set of striking, glassy, lustrous, blue-gray, dipyramidal quartz crystals colored by aerinite inclusions from near Malaga, Spain. Aerinite is a rare silicate, found worldwide almost exclusively in Spain. Each of the four, pristine compound crystals has unique character. A well-written article on this find is found in the Mineralogical Record, Volume 27, Number 2, March/April, 1996.