Blue Chalcedony Earrings Collections Blue Chalcedony is a stone with a delicately feminine aura, a stunning blue gemstone that exudes elegance, and a blue hue that evokes the sea and seems calm and lovely. Your Blue Chalcedony Earring will make you feel at rest every time you gaze at it, much as when a cool wind caresses your face. The birthstone for those born in the month of March is blue chalcedony. Gemini sign individuals may benefit from and look excellent in blue chalcedony jewelry by wearing it.