Olivier Round Kyanite CufflinksIn ancient times, Kyanite was used by travellers as a compass as it could follow the earth's magnetic force in the same way as a compass needle. Whether this is still a useful trait is debatable, but the beautiful shades of blue will certainly pass the test of time. Each cufflink has a unique round cabochon of Kyanite. Simply set in sterling silver with a T bar fastening Approx 20. 3 Total Carat Weight