This gorgeous 14 K. Solid Gold Solitaire Ring with Natural Peridot is the perfect August birthstone ring. With an adorable 5mm sized peridot in the center of a solitaire setting weighing in at 0.65 carats, this ring is sure to bring a smile to her face. Vibrant green peridot is an energizing and happy color, and this ring is certainly no different. The simple band is available in white, rose or yellow gold precious metals. Sizes range from a very small 5 to a size 11. Everyone is sure to find the perfect combination for their 14 K. Solid Gold Solitaire Ring with Natural Peridot.