Carnelian is the translucent red/orange form of crypto-crystalline quartz called chalcedony. It is a form of Agate. Carnelians are found in large deposits throughout the world and frequently have bright beautiful colors and patterns. They are usually cut into cabochons and most varieties are relatively inexpensive. It is often also used as a carving material.

Color is the important characteristic in determining a carnelians value. In most cases, the value of the stone will be substantially less than the value of the mounting.