Stone of Good Fortune. The word opal is derived from the Sanskrit word “upala” meaning “valuable stone.” In ancient times, the Greeks thought opal to be the “tears of Zeus” and prized it as valuable as diamonds. Once opal began to rival diamonds, the people in the diamond mining business made up a myth that opal was a carrier of bad luck, to make sure the diamond reigned supreme. However, throughout history, the opal has actually been seen as a sign of “good luck” and is a very precious stone with many various forms and types. 95% of today’s precious opals are mined out of Australia. To us, the opal is eternal and will always be a glamorous yet deeply spiritual stone.