This specimen features a super example of the phenomenon of a “curved” or “bent” quartz crystal. A bent quartz crystal forms where there is significant physical stress on the crystal such that during formation it breaks more or less perpendicular to the c-axis and then continues to grow after slight displacement. When repeated, the process results in continuing growth in a curve. The quartz crystals on this piece are surrounded by sharp magnesite crystals. A great piece from the John S. White quartz collection.