In this talk, we first review the band bases of the skein algebras (equivalently, the quantum cluster algebras) associated with unpunctured surfaces. We then show that these bases coincide with the common triangular bases, that is, the Kazhdan-Lusztig-type bases of these quantum cluster algebras. In our approach to this result, we discover a phenomenon in which the null loops involved are arranged in configurations resembling beads on a necklace. This is a joint work with Chao Shen.