Sardonyx is a combination of minerals sard and onyx, which together form a reddish-brown or orange stone with bands of white or black. This birthstone is associated with courage and happiness.

Peridot, spinel and sardonyx are August's three birthstones. Prime Day Deals: Shop sales in tech, home, fashion, beauty & more curated by our editors. Peridot is a yellow-green stone that comes ...

Harris provides a vivid description of the stone: "Sardonyx is the sophisticated cousin of onyx with its interesting layers of sard and onyx, creating red and white bands.

Each month has at least one gemstone. Here is what you need to know about August's birthstones: peridot, spinel and sardonyx.