Opalized ammonite fossils are formed through a unique geological process involving the replacement of organic material with silica, which is the primary component of opal. This process can occur ...

One in a billion bones becomes a fossil — even fewer turn into opal. In a pocket of north-western New South Wales, two pioneering women are uncovering relics of our deep past. In a small room of ...

Other fossils include: turtles, crocodiles, fish, birds, early mammals, mussels, snails, giant marine reptiles, pine cones, plant stems and seeds. The Australian Opal Centre has 4000 or more fossils ...