White-blue gradient beads with cracks are called natural seasonal crystal gradient beads. White and blue graded crack beads are usually called "natural timely crystal graded beads" or "graded crystal beads". This kind of bead is made of natural seasonal crystal, showing the effect of gradual change of white and blue, with cracks or cracks on the surface, which is caused by the natural structure inside the crystal. Graduated crystal beads are very popular in handmade jewelry making, DIY bracelets or necklaces because of their unique aesthetic feeling and attraction.