Polychromatic Tourmaline Plain Tubes measure approximately 6.5x6.5mm up to 20x9mm in size, the gems have a vitreous luster with excellent polish, Tourmaline beads have an asymmetrical plain tube body, the gems are transparent with internal characteristics, the beads are a spectacular group of Polychromatic Tourmaline of Pink, Green, Mint, and White hues, particularly impressive are the consistent natural hues of pink and green within this group, these tourmaline beads are medium light in saturation, and these Tourmaline beads are world class in character. AA Grade