18K White Gold Diamond Bangle with 5.60ct bagget cut rubs %100 natural stones and 1.43ct in diamonds . RDB015NG2J Red ruby is the birthstone for the month of July;it exemplifies love, health and wisdom. It was believed that wearing a red ruby bestowed good fortune on its owner. A ruby is known to be the most valuable birthstone and its value increases based on its color and quality.