Cartier Tri Color Gold 3.50ctw Pave Diamond Star Trinity Slip On Bangle Bracelet 100 Year Anniversary Bangle Bracelet by Cartier. 18K tri-color gold bangle. This piece was made for Cartier's 100th Anniversary. It is their classic Trinity bangle with diamonds inset in stars. There are 100 round diamonds totaling 3.50 carats. Each band measures 8.7mm wide. Inside opening diameter 60mm. Cartier size 18.