Vintage Necklace Or Brooch Gold with Blue & Clear Rhinestone Dangle RARE 1950s

This is a very special piece that is attributed to BSK. I have found only one other that has already been sold and the earrings were marked. This is one piece only and it is a necklace but can also be converted to a brooch, It does have a brooch pin on the back. This is gold toned metal extremely decorative with long dangles. Is accented with rhinestones. The chain is not original to the piece and can easily be substituted. Please see the photos for condition and size