Tourmaline semi precious gemstones, 14mm diameter. Price is per bead. 1 Strand is approx. 28 beads, beads may come strung or loose. Healing Properties: Blue varieties (Indicolite) are said to relieve stress. Green varieties (Verdelite) are said to speed general healing and help regain strength. Black Tourmaline is said to help clear the psyche of negative energy. Mystical properties: Tourmaline is thought to bring favor from the Muses and is sometimes considered lucky for artists, writers and other persons pursuing creative careers.