These faceted Tanzanite rondelles are a luscious blue color that looks slightly purple in some lighting situations & clarity is very good. The beads are machine cut with micro-facets, giving excellent uniformity of shape and size, not to mention excellent sparkle. Our latest stock of these beads are about 3.3 to 3.4mm in diameter. Strands are about 15 to 15.5 inches in length.