A 22k gold ring is made of 22 karat gold, which means it contains 91.67% pure gold and is often referred to as "22 carat" gold. This type of gold is known for its rich, deep yellow color and high purity. The ring can vary in design, style, and gemstone embellishments, but its primary feature is the use of 22k gold in its construction, making it a valuable and luxurious piece of jewelry.