I bought one as well in those days and remember the lace itself provided a green/black neck.
It was a leather lace and because of the humidity in the hall where I bought it before the show my neck became a little sweaty and the leather lace started to leave its color on my skin.
I remember seeing Ingrids goldplated heart at a picture somewhere and it looked stunning compared to the original.
Maybe I'll have mine done one day, no way in h#ll i'm gonna sell it...