Audemars Piguet Royal Oak 15514BC.TM.1284BC.01 Pink Tourmaline '50th Anniversary' White Gold Tourmaline Pink Dial

Tourmaline occurs in more colours than any other gem species, and the pink variety is coloured by manganese. It is the most delicate colour in the anniversary set — pale enough that any variation between stones would be immediately visible against white gold.

The white gold case measures 41 mm with a gem-set bezel. The white gold dial is set with baguette-cut pink tourmalines and carries white gold Royal Oak hands. The watch is completed on a white gold bracelet set with baguette-cut pink tourmalines and an AP folding clasp. Tourmaline is strongly pleochroic, so the cutter has to orient each baguette to the right axis or the colour drops out of the stone entirely. Part of the Royal Oak collection.

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