How are sardonyx and peridot different?

Sardonyx and peridot are distinct gemstones with different compositions and appearances. Sardonyx is a banded variety of chalcedony, featuring layers of reddish-brown and white, while peridot is a gemstone variety of the mineral olivine, known for its vibrant green color. Additionally, sardonyx is often used in carvings and cameos due to its layered structure, whereas peridot is typically cut into faceted shapes for jewelry. Their differing colors, origins, and uses highlight their uniqueness in the world of gemstones.