Crystal Information Formula:SiO2 A variety of Quartz FSQ-111 16.65 grams, 4.5 cm Boekenhouthoek, Mpumalanga Province, South Africa Quartz crystals encrusted by a second generation of smaller crystals grown on the prism faces. The small second generation crystals point away from the prism and their orientation is not related to the crystallographic orientation of the central crystal. Often the tips of the first generation crystals remain free.