The birthstone for August is a combination of six different gemstones: PERIDOT (7 letters), Sardonyx (8 letters), OPAL (4 letters), TOPAZ (5 letters), GARNET (6 letters), and RUBY (4 letters). PERIDOT is a gemstone with a yellow-green hue, while Sardonyx is a type of onyx with alternating bands of red and white. OPAL is a gemstone known for its rainbow-like play of color, while TOPAZ is a gemstone that can range in color from yellow to blue. GARNET is a deep red gemstone, and RUBY is a gemstone that is also known for its deep red color.