This delicate Onyx and marcasite ring is perfect for all occasions. It was once thought that onyx eliminates negative thinking, heightens the senses and improves intuition.Black Onyx Information: Number of Stones: 1 Stone Shape: Square Stone Size: 5mm x 5mm Carat Weight: 0.33ct Natural/Created: Natural Onyx Marcasite Information: Number of Stones: 28 Stone Shape: Round Stone Size: 2 x (1.20mm) | 2 x (1.10mm) | 2 x (1mm) Carat Weight: 0.07ct