Foil-lined beads can be quite beautiful and unique.
I’ve seen them in all shapes and sizes. Personally, I prefer foil pendants, but I have seen beautiful pieces of jewelry made with foil beads.
These types of beads are sometimes called Murano or Venetian, as the technique to make the beads were perfected on the Murano island in Venice.
There is a generally a silver or gold foil liner embedded within the glass, which creates the foil luster appearance. Different artisans will use different color glass to create different variations of the foil look.