Baby Vine Tendril Ring 9kt yellow gold 0,5 g and silver g 2,06 with Lavander enamel and drop cut Smoky Quartz ct. 0,76. Material: Gold Karat: 9K Stone: Quartz Stone Colour: Grey Number of Stones: 1 Stone Carat: 0,76 Stone Shape: drop Stone Setting Type: 4 prong Available sizes: 50,52,54,56 Does it come with certificate? No Can the piece be engraved? No