A nice classic Franklin, New Jersey Willemite crystal well exposed on Calcite. Vivid fluorescence, sharp prism faces and not acid etched out of the matrix (which was usually done but looks melted and is less desirable). The crystal is typically crude and slightly rounded on some edges with natural cracks but no repairs.
Choice, bright blue transparent to translucent Willemite clusters covering matrix. Several have well-formed crystals in stacks and isolated prisms. Some areas of Duftite provides a nice contrast. Excellent "wet look" luster, this is in fine condition.