The sharp edges or stringers around the holes of the beads are a normal result of the Venetian glass bead making process. Fine pieces of the glass remain on the mandrel that the bead maker uses to form the bead. They are not a defect or an imperfection, rather a sign that your bead is handmade.
Filing the sharp edges with a bead reamer will help prevent the beads from cutting your stringing material and allow them to sit flush to each other.
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