Tektites are irregularly and sometimes, intricately shaped nodules and blobs of a glassy substance that are thought to be the products of melted terrestial rocks (possibly formed by the impact of...

Opal is one of the world’s most beautiful gemstones. Unlike any other gemstone, opal displays rainbow spectrum colours in a moving pattern known as the “play of colour”. Opal is Australia’s...

Ammonites are prehistoric nautilus (extinct marine animals), related to the chambered nautilus, squid, cuttlefish and octopus family. They appeared 400 million years ago and thrived during the...