Czech seed beads in the shape of a four-leaf clover (PRECIOSA Corollas) are made by cutting glass tubes with a straight or super-twisted surface.
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Czech seed beads in the shape of a square are made by cutting square glass tubes with a round or square hole. The surface of the PRECIOSA Squares can be twisted or super-twisted.
Czech seed beads in the shape of an oblong, also known as PRECIOSA Oblongs, are made by cutting oblong glass tubes with a round hole.
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