Cartier Trinity Diamond 18k WGold Ceramic Rolling Band Size 55-US 7.5 Paper. This is a authentic triple band ring by Cartier, it is crafted from 18k white gold and black ceramic with a high polished finish from Cartier's Trinity collection and is composed of three 3mm wide bands, 1 in black ceramic and two in white gold, one decorated with diamonds, all in an interlocking design. It has the designer hallmark, serial number and metal content on the inside the band. Comes with Cartier polish paper and box. Material: 18k white gold & cermaic Hallmark: Cartier 750 55 SW4795 Measurement: Each band is: 3mm Wide Ring Size: US: 7.5 European: 55 Diamonds: 51 points F color, VVS1 clarity. Weight: 5.4 grams Stock# 57391