10.4 x 7.5 x 3.2 cm (largest). A very fine and pretty pair of sliced and polished, hollow, agatized coral fossil. The snow-white exterior is a striking accent to the geode halves lined with sparkly amber shades of chalcedony - considered very rare and of highest quality replacement for this material. This is one of those unusual cases where biology meets mineralogy. This excellent specimen is from the Hauck Collection.