Carnelain & Dumortierite Gemstone Necklace is 27". Silver rondelles separate gemstones. Pendent is Carnelain and 1 1/2" in diameter. Connects with screw clasp. Carnelain is believed to be a stone of protection particularly from anger, jealousy and fear. Dumortierite is also called "blue denim stone" as it looks great with jeans or a suit. Dumortierite is thought to enhance organizational abilities, self-discipline and orderliness.