A necklace worn high on the neck is a choker[?].
In BDSM, a necklace can serve as an elegant kind of slave collar[?].
See also:
... Lightfoot 1987 The Guess Who[?] 1989 The Band 1990 Maureen Forrester[?] 1991 Leonard Cohen 1992 Ian and Sylvia[?] 1993 Anne Murray 1994 Rush 1995 Buffy ...