Sliced and polished agatized coral pair, containing translucent tea-colored botryoidal chalcedony. On one side (left in the photo), the chalcedony has been coated with white common opal, and the natural “escape channel”, where silica-bearing solutions entered the fossil, can be seen in the lower center of the piece. There are additional escape channels in the upper left portion of this half, with some common opal “bathtub rings” evident. Good external fossil preservation. From the early Miocene Hawthorn Group. The chalcedony is fluorescent yellow under longwave, midwave and shortwave UV light. Dimensions: 122 x 95 x 35 mm & 119 x 100 x 22 mm