Opal and Diamond Cluster Ring. Opals are endlessly entertaining for their hypnotic plays of colour, caused by light passing through their internal structures of minute silica spheres. They are stones of tremendous variety, and their plays of colour are as unique as fingerprints. Despite a short blip in the mid 19th century, when opals unfairly gained a reputation as being unlucky due to one being blamed in a novel by Sir Walter Scott for bringing misfortune to its owner, opals have in fact long been thought as very lucky stones, embodying the virtues of all the stones whose colours were present in its play of colour. An opal with blue in it possessed the powers of aquamarine and sapphires, for example. Set within a cluster of single-cut diamonds with stylised lily shoulders, the opal at the centre of this charming ring has a mix of oranges, greens and blues, so any future wearer should be well covered!