October has two birthstones: opal and ... violet and black. This is fitting since tourmaline's name derives from the Sinhalese word "toramalli," which means "stone with mixed colors," according ...

Reason to smile: Starry Starry Night Cocktail Ring featuring a 17.50-carat Australian black opal, by Queensland jeweller Margot McKinney. For a jewellery house in The Rocks, Sydney’s ground ...

Most of the stones are ‘black’ opals from the Lightning Ridge field, New South Wales, where the gem occurs in fissures or joints in sandy sediments of Cretaceous age. Since the ‘black ...