This de Grisogono amethyst peridot ring features peridot and amethyst gemstones set in 18k white gold. The amethysts total 4.10 carats and the peridot totals 2.75 carats. This is a fun and.... Stone: 135 Round Brilliant Cut Amethysts weighing 4.10 carats; 74 Round Brilliant Cut Peridots weighing 2.75 carats; Metal: 18K White Gold, Hand Finished, White Gold, Hand Finished