An beautifully polished goniatite of the order Goniatitida part of the sub class of ammonoidea. This image speaks volumes, a delightful specimen.The sediments over time have created distinctive linear definition, the inner shell morphology the chambers of the cephalopod, have infilled with white calcite, a form of the mineral quartz. These minerals formed from within the fossil bed, by a process of per-mineralization, heavily mineral saturated water from the locality has been forced through the tissues of the shell in a cell by cell absorption process. This eventually turning the remains of the cephalopod into limestone.
Once discovered in the fossil layer it was collected in its tomb of solid limestone, then patiently released from its host rock and carefully worked and polished to reveal the inner ceratitic chambers. A unique occurrence which has been brought back to life so to speak, through the fossil preparators preparation process.
The ammonoid free stands enabling display. The ceratitic chambers which identify the type of ammonoid are naturally filled with very subtle lime green quartz. The chamber walls picked out in contrasting black. A highly decorative and interesting study fossil.