An extravagant Cartier diamond set stick pin in platinum. To the top of the stick pin a stylised open work knot featuring two interlinking ribbons twisting to a point, each set with round rose cut diamonds in channel, grain and rub-over settings, framed throughout with fine mille-grain decoration. The twisted point to the top includes a spring mechanism which allows the central pin to move. All fitted to a platinum pin. Estimated total diamond weight 1.12ct. Assessed diamond colour: H-I. Assessed diamond clarity: SI.