Opals

What is an Australian Opal and Why Opals change colour?

The name Opal was probably derived from Sanskrit “upala”, meaning “valuable stone”. This was probably the root for the Greek term “Opallios”, or a “stone from several elements”. So, the ancient Romans may already have had an inkling why Opals show such a striking play of colours. Unlike most gems, Australian Opals are infinitely varied…