It is a work of astonishing sensibility that traversed high jewellery and watchmaking barriers in a way no secret watch has.  At its core, Cartier has constructed a best-case scenario straight out of a fantasy where mechanical magic and gemological prestige converge potently to inspire nothing but burning envy and lust.


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The Tourbillon Mystérieux Azuré pendant is as achingly beautiful as it is mechanically so. It employs the Cartier hand-wound caliber 9463 MC, a double mystery tourbillon movement like that in the Rotonde de Cartier Double Mystery Tourbillon where it appears to be suspended without support.


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But in this instance, however, the arresting movement shares center stage with the glamourous, stylised façade of a night butterfly ornately set with diamonds of varying cuts, one gob-stopping 25.93-carat oval-shaped Ceylon sapphire from Sri Lanka, more sapphires and onyx along the tips of its wings.  This is a transformable piece which can be worn as a medallion where the big solitaire sapphire can be detached from the rest of its diamond-spattered body. The fully decorated innards of its movement are made visible through its sapphire rear back.


This magnificent showpiece demanded an eye-watering 2,050 hours of labour, the equivalent of 17 months of intense collaboration between the watchmakers and jewellers of Cartier.  It is a piece-unique and to wit, one of unparalleled allure.