Yellow blob necklace

A peculiar and unsigned modernist lavaliere necklace. The chain is medium quality with some wear revealing a clashing brass underneath the silvery shine. The core and assisting pendants have a good abstract spiderweb look to them, but ultimately it's the center glass that's the show stealer. Whatever it reflects looks ridiculously cartoony when viewed from the front to a couple of degrees sideways. Sideways the yellow blob is non-existant. As for age, I'm thinking 80s' at the oldest, but probably younger.