A pearl and diamond ring and a citrine and diamond ring

A pearl and diamond ring and a citrine and diamond ring
The marquise-shaped pierced plaque millegrain-set with old brilliant and old single-cut diamonds, centrally set with a single pearl, pearl not tested for natural origin, finger size P; the second set with a circular-cut citrine within a crossover design border set with brilliant and baguette-cut diamonds, finger size P½
Partially illustrated (2)