ROCK YOUR WORLD

Gemstone provenance takes centre stage in the latest jewels featuringthe finest rare minerals

This glittering “black” gem with a holographic effect sets itself apart from the other types of opals, thanks to carbon and iron oxide traces. Its unusually dark body tone also allows the rainbow-like hues to radiate more vividly than in lighter opals. Australia produces over 90 per cent of the world’s opals, with Lightning Ridge being the most prestigious and frequently featured in high jewellery for its rare black opals. They are so much harder to find now that an exceptional gem-quality specimen can fetch up to A$15,000 (S$14,550) per carat. The scarcity of this delicate mineral (its hardness is 5.5 to 6.5 on the Mohs scale) is further compounded by high fuel prices and lease fees that make mining very costly.

A ribbon motif highlights Tiffany & Co.’s unparalleled level of craftsmanship in this remarkable platinum-set brooch. Showcasing an oval cabochon black opal of over 37 carats with baguette sapphires and diamonds totalling more than 23 carats, this piece’s clean and organic aesthetics belie its complexity of craftsmanship.