This gemstone is well-known for its "play-of-color," or ability to shift color. Opals often have a kaleidoscope of colors on their surface. This birthstone symbolizes purity, hope and truth.

Here's what you need to know about August's birthstones, including their colors, symbolism, meanings and more. What is August birthstone? August has three birthstones: peridot, spinel and sardonyx.

Sardonyx is a combination of the minerals sard and onyx, which together form the reddish-brown or orange stone with bands of white or black. The gem's name is also a mix.

Here's what you need to know about August's birthstones, including their colors, symbolism, meanings and more. What is August birthstone? August has three birthstones: peridot, spinel and sardonyx.

Here's what you need to know about August's birthstones, including their colors, symbolism, meanings and more. What is August birthstone? August has three birthstones: peridot, spinel and sardonyx.

Here's what you need to know about August's birthstones, including their colors, symbolism, meanings and more. What is August birthstone? August has three birthstones: peridot, spinel and sardonyx.