Swirl

Strictly speaking not a paperweight - but either the ornamental knob on a ceremonial cane or possibly what is known as a “witch ball” - plain or decorated glass spheres hung in windows to ward off evil spirits or suspended from the rafters for decorative effect. This one is certainly most decorative with its swirling white and yellow latticinio and filigree cables alternating with red twists. Possibly made before the 1840s, although they were popular throughout the 19th century. The hole at the bottom would have been filled with wax or a metal hook so that it could be suspended.
(Illustrated on page 20 of Robert Hall’s book “World Paperweights, Millefiori & Lampwork”).