  We provide an illustration of a geometric structure that exhibits the
spin-half wave-function characteristics, namely that its full rotation displays
a phase inversion. We show that general fractional-spin geometric structures
are possible, along with sketchy discussions concerning group-theoretical and
quantum descriptions, as well as pose some queries. Synthesis of a
$(PF_3)_n$-chain polymer in the form of a twisted ring is proposed as a
realization of a quazi-spin-1/3 structure.
