Calibrated stones allow uniformity for production work and are easily set with pre-made bezel cups. The allure of carnelian lies in its rich, orange-red color and glossy surface.
Iron gives carnelian its color. The stone is thought to cool and purify the blood, thwart angry feelings, and enhance passion. Carnelian is found in Brazil, India, and Uruguay. Mohs hardness: 7
4mm Round Carnelian Cabochon