What is the fine-grained topic of the following text: The XILION Bead is the most popular bead shape that we sell, it replaces the 5301 Bicone bead which Swarovski have transformed into the new patented 5328 shape: It features 50% more facets for extra brilliance and light refraction, a smoother equator for increased comfort during wearing and rounded hole edges to protect stringing materials. Only return the topic.
Swarovski XILION Bead Features and Transformation from 5301 Bicone Bead