Collection: Specimens and Fossils

Opal forms in cavities within rocks. If the cavity is there because part of a living thing – for example a bone, shell or pinecone – was buried in the sand or clay before it turned to stone, then the opal can form a fossil replica of the object that was buried.

Opal specimen are solid, unprocessed natural opal straight from the mines or have been slightly polished for the sole purpose of displaying as part of a collection to be admired.