Sterling Silver art deco geometric pendant necklace 18”

The chain is a 1mm Singapore / twist, stamped 925 The pendant is not stamped - it used to be a ring with a cubic type structure on a square band and I had it turned into a pendant. The thing is that one of the people involved in the operation was a dummy that squished the structure into the form that you see now. I believe the 925 stamp was on the band, which I no longer have. Rest assured, you can tell it’s silver by the way it tarnishes and cleans with baking soda. Still a cool piece; I’ve just never worn it in the last 10 year (or more) 18” long