Those born in August have three beautiful birthstones to choose from! The original birthstone is Sardonyx, a reddish Zebra striped gemstone. Then Peridot was added, a vibrant and vivid lime green gemstone. Finally, Spinel, available in a range of colours and often being mistaken for ruby or sapphire. Today, we are focusing on arguably the most popular out of the three, Peridot.