The opal Mr Darby found encased in stone is known as a "Yowah nut". It's a rarity found only around Yowah in Queensland's far south-west, which is closer to South Australia than it is to Brisbane.

A teacher from Australia was reunited with an opal gifted ... to which the class responded they had. An opal stone was duly sent to Roald Dahl via his publisher, Penguin. Roald Dahl thanked ...

Opals can be found across the globe, though Australia is the largest source for the stone, according to the Geological Institute of America. Opals can also be found in Ethiopia, Mexico ...

Gradually, the stone gained respectability ... Honduras and the United States also have mines, Australia officially claims that "95% of the world's precious opals" come from its territory.

Opal is a gemstone of spectacular beauty and variety, enchanting connoisseurs and collectors with its kaleidoscopic play of colours. Revered as a symbol of good fortune and creativity, opal has ...

Beneath the desert of South Australia, a photographer finds a community of opal miners with a "crazy ... I was fascinated with the fact that a stone can drive people into the deepest joy or ...

A teacher from Australia visited a museum in Buckinghamshire ... changed the way his students viewed their world. The opal stone gift to Dahl was the result of a conversation during this call.

Australia's only nuclear reactor - the OPAL multi-purpose research reactor - has officially returned to power and recommenced operations, following a months-long planned shutdown to carry out ...

A teacher from Australia was reunited with an opal gifted by his class to the children's author Roald Dahl more than 30 years ago. Mark Taylor, 57, made a special trip to the Roald Dahl Museum and ...