Nephrite is a type of jade, a mineral known for its toughness and beauty. It is primarily composed of two minerals: actinolite and tremolite. Nephrite is often found in shades of green, but it can also appear in white, yellow, or gray. This stone has been used for thousands of years in various cultures, particularly in Chinese art and jewelry. Nephrite is prized for its durability, making it suitable for carving intricate designs and tools. It is commonly used in ornamental objects, such as sculptures and jewelry, and is often associated with spiritual significance in many traditions.