🎁🇨🇮Floating red glass beads choker or short necklace-vintage from Italy

Purchased in Roma Italia. 1998. Beads are different sizes and shapes on three main fine black strings, several secondary strings stem from the main strings. Secured with a claw. A metal string ending with one red bead can change the length of the necklace from loose choker to about midway between neckline and breast. See relevant pictures to get a better idea. Beads are made of glass. Each is cut differently and that brings light and movement to this beautiful piece. Purchased in historical part of Roma in 1998. Lenght: 16 to 19 inches depending on where you clamp the necklace. Like new and suitable as a gift. I can wrap it if you tell me the occasion!