Complete and undamaged tetrahedron of Chambersite, a rare mineral found in salt formations in a small number of localities worldwide. Translucent 'Amethyst' purple in color with flat, truncated tips. There is a small natural notch in one side and has good luster. Collected by Fred Pough in 1970. Ex. Chuck Trantham collection. Comes with a small second \"bonus\" crystal 0.25cm in size.