Carnelian Chalcedony colored by Iron Oxide: SiO2 Mohs: 6–7 Source: Brazil, India, Russia, and Germany Carnelian protects against evil emotional envy and rage. It enhances your inner talents and skills. Carnelian stimulates precision and analytical capabilities. Increases self-esteem, concentration, and perceptiveness. Carnelian dispels sorrow, apathy indolence and passivity. Removes bad temper. depression and fear. Carnelian cleanses other stones. It is good for hay fever. infections, colds, pancreas, lungs, rheumatism, kidneys. spine. muscle. spleen and blood poisoning.