Torchon bobbin lace to make a bookmark with the October Opal birthstone. The pattern requires 9 pairs of bobbins and uses variegated 35wt or 1 strand of embroidery thread, a gimp thread and beads.Valdani 30, Finca. The bookmark measure 14cm x 4.5cm. The pattern comes with full instructions and is ideal for lacemakers with some knowledge.