Large ring in yellow gold, silver, black enamel, diamonds and Fanfani Fabio citrine quartz

MATERIAL: yellow gold, silver, black enamel, diamonds and citrine quartz DESCRIPTION: large shield ring made in the center with square-cut citrine quartz framed with small brilliants on a high black enamel base, signed 'Fabiani Fabio', bears the 750 mark MEASURES : ring 7 WEIGHT: 17.6 g